2 * Copyright (c) 2003-2010 Tim Kientzle
3 * Copyright (c) 2012 Michihiro NAKAJIMA
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer
11 * in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include "archive_platform.h"
29 __FBSDID("$FreeBSD$");
31 #if !defined(_WIN32) || defined(__CYGWIN__)
33 #ifdef HAVE_SYS_TYPES_H
34 #include <sys/types.h>
39 #ifdef HAVE_SYS_EXTATTR_H
40 #include <sys/extattr.h>
43 #include <sys/xattr.h>
44 #elif HAVE_ATTR_XATTR_H
45 #include <attr/xattr.h>
50 #ifdef HAVE_SYS_IOCTL_H
51 #include <sys/ioctl.h>
53 #ifdef HAVE_SYS_STAT_H
56 #ifdef HAVE_SYS_TIME_H
59 #ifdef HAVE_SYS_UTIME_H
60 #include <sys/utime.h>
62 #ifdef HAVE_COPYFILE_H
74 #ifdef HAVE_LANGINFO_H
77 #ifdef HAVE_LINUX_FS_H
78 #include <linux/fs.h> /* for Linux file flags */
81 * Some Linux distributions have both linux/ext2_fs.h and ext2fs/ext2_fs.h.
82 * As the include guards don't agree, the order of include is important.
84 #ifdef HAVE_LINUX_EXT2_FS_H
85 #include <linux/ext2_fs.h> /* for Linux file flags */
87 #if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__)
88 #include <ext2fs/ext2_fs.h> /* Linux file flags, broken on Cygwin */
109 #ifdef F_GETTIMES /* Tru64 specific */
110 #include <sys/fcntl1.h>
114 * Macro to cast st_mtime and time_t to an int64 so that 2 numbers can reliably be compared.
116 * It assumes that the input is an integer type of no more than 64 bits.
117 * If the number is less than zero, t must be a signed type, so it fits in
118 * int64_t. Otherwise, it's a nonnegative value so we can cast it to uint64_t
119 * without loss. But it could be a large unsigned value, so we have to clip it
122 #define to_int64_time(t) \
123 ((t) < 0 ? (int64_t)(t) : (uint64_t)(t) > (uint64_t)INT64_MAX ? INT64_MAX : (int64_t)(t))
126 #include <TargetConditionals.h>
127 #if TARGET_OS_MAC && !TARGET_OS_EMBEDDED && HAVE_QUARANTINE_H
128 #include <quarantine.h>
129 #define HAVE_QUARANTINE 1
137 /* TODO: Support Mac OS 'quarantine' feature. This is really just a
138 * standard tag to mark files that have been downloaded as "tainted".
139 * On Mac OS, we should mark the extracted files as tainted if the
140 * archive being read was tainted. Windows has a similar feature; we
141 * should investigate ways to support this generically. */
144 #include "archive_acl_private.h"
145 #include "archive_string.h"
146 #include "archive_endian.h"
147 #include "archive_entry.h"
148 #include "archive_private.h"
149 #include "archive_write_disk_private.h"
158 /* Ignore non-int O_NOFOLLOW constant. */
159 /* gnulib's fcntl.h does this on AIX, but it seems practical everywhere */
160 #if defined O_NOFOLLOW && !(INT_MIN <= O_NOFOLLOW && O_NOFOLLOW <= INT_MAX)
169 #define AT_FDCWD -100
173 struct fixup_entry *next;
174 struct archive_acl acl;
180 unsigned long atime_nanos;
181 unsigned long birthtime_nanos;
182 unsigned long mtime_nanos;
183 unsigned long ctime_nanos;
184 unsigned long fflags_set;
185 size_t mac_metadata_size;
187 int fixup; /* bitmask of what needs fixing */
192 * We use a bitmask to track which operations remain to be done for
193 * this file. In particular, this helps us avoid unnecessary
194 * operations when it's possible to take care of one step as a
195 * side-effect of another. For example, mkdir() can specify the mode
196 * for the newly-created object but symlink() cannot. This means we
197 * can skip chmod() if mkdir() succeeded, but we must explicitly
198 * chmod() if we're trying to create a directory that already exists
199 * (mkdir() failed) or if we're restoring a symlink. Similarly, we
200 * need to verify UID/GID before trying to restore SUID/SGID bits;
201 * that verification can occur explicitly through a stat() call or
202 * implicitly because of a successful chown() call.
204 #define TODO_MODE_FORCE 0x40000000
205 #define TODO_MODE_BASE 0x20000000
206 #define TODO_SUID 0x10000000
207 #define TODO_SUID_CHECK 0x08000000
208 #define TODO_SGID 0x04000000
209 #define TODO_SGID_CHECK 0x02000000
210 #define TODO_APPLEDOUBLE 0x01000000
211 #define TODO_MODE (TODO_MODE_BASE|TODO_SUID|TODO_SGID)
212 #define TODO_TIMES ARCHIVE_EXTRACT_TIME
213 #define TODO_OWNER ARCHIVE_EXTRACT_OWNER
214 #define TODO_FFLAGS ARCHIVE_EXTRACT_FFLAGS
215 #define TODO_ACLS ARCHIVE_EXTRACT_ACL
216 #define TODO_XATTR ARCHIVE_EXTRACT_XATTR
217 #define TODO_MAC_METADATA ARCHIVE_EXTRACT_MAC_METADATA
218 #define TODO_HFS_COMPRESSION ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED
220 struct archive_write_disk {
221 struct archive archive;
224 struct fixup_entry *fixup_list;
225 struct fixup_entry *current_fixup;
228 int64_t skip_file_dev;
229 int64_t skip_file_ino;
232 int64_t (*lookup_gid)(void *private, const char *gname, int64_t gid);
233 void (*cleanup_gid)(void *private);
234 void *lookup_gid_data;
235 int64_t (*lookup_uid)(void *private, const char *uname, int64_t uid);
236 void (*cleanup_uid)(void *private);
237 void *lookup_uid_data;
240 * Full path of last file to satisfy symlink checks.
242 struct archive_string path_safe;
245 * Cached stat data from disk for the current entry.
246 * If this is valid, pst points to st. Otherwise,
252 /* Information about the object being restored right now. */
253 struct archive_entry *entry; /* Entry being extracted. */
254 char *name; /* Name of entry, possibly edited. */
255 struct archive_string _name_data; /* backing store for 'name' */
256 char *tmpname; /* Temporary name * */
257 struct archive_string _tmpname_data; /* backing store for 'tmpname' */
258 /* Tasks remaining for this object. */
260 /* Tasks deferred until end-of-archive. */
262 /* Options requested by the client. */
264 /* Handle for the file we're restoring. */
266 /* Current offset for writing data to the file. */
268 /* Last offset actually written to disk. */
270 /* Total bytes actually written to files. */
271 int64_t total_bytes_written;
272 /* Maximum size of file, -1 if unknown. */
274 /* Dir we were in before this restore; only for deep paths. */
276 /* Mode we should use for this entry; affected by _PERM and umask. */
278 /* UID/GID to use in restoring this entry. */
284 /* Xattr "com.apple.decmpfs". */
285 uint32_t decmpfs_attr_size;
286 unsigned char *decmpfs_header_p;
287 /* ResourceFork set options used for fsetxattr. */
288 int rsrc_xattr_options;
289 /* Xattr "com.apple.ResourceFork". */
290 unsigned char *resource_fork;
291 size_t resource_fork_allocated_size;
292 unsigned int decmpfs_block_count;
293 uint32_t *decmpfs_block_info;
294 /* Buffer for compressed data. */
295 unsigned char *compressed_buffer;
296 size_t compressed_buffer_size;
297 size_t compressed_buffer_remaining;
298 /* The offset of the ResourceFork where compressed data will
300 uint32_t compressed_rsrc_position;
301 uint32_t compressed_rsrc_position_v;
302 /* Buffer for uncompressed data. */
303 char *uncompressed_buffer;
304 size_t block_remaining_bytes;
305 size_t file_remaining_bytes;
309 int decmpfs_compression_level;
314 * Default mode for dirs created automatically (will be modified by umask).
315 * Note that POSIX specifies 0777 for implicitly-created dirs, "modified
316 * by the process' file creation mask."
318 #define DEFAULT_DIR_MODE 0777
320 * Dir modes are restored in two steps: During the extraction, the permissions
321 * in the archive are modified to match the following limits. During
322 * the post-extract fixup pass, the permissions from the archive are
325 #define MINIMUM_DIR_MODE 0700
326 #define MAXIMUM_DIR_MODE 0775
329 * Maximum uncompressed size of a decmpfs block.
331 #define MAX_DECMPFS_BLOCK_SIZE (64 * 1024)
333 * HFS+ compression type.
335 #define CMP_XATTR 3/* Compressed data in xattr. */
336 #define CMP_RESOURCE_FORK 4/* Compressed data in resource fork. */
338 * HFS+ compression resource fork.
340 #define RSRC_H_SIZE 260 /* Base size of Resource fork header. */
341 #define RSRC_F_SIZE 50 /* Size of Resource fork footer. */
342 /* Size to write compressed data to resource fork. */
343 #define COMPRESSED_W_SIZE (64 * 1024)
344 /* decmpfs definitions. */
345 #define MAX_DECMPFS_XATTR_SIZE 3802
346 #ifndef DECMPFS_XATTR_NAME
347 #define DECMPFS_XATTR_NAME "com.apple.decmpfs"
349 #define DECMPFS_MAGIC 0x636d7066
350 #define DECMPFS_COMPRESSION_MAGIC 0
351 #define DECMPFS_COMPRESSION_TYPE 4
352 #define DECMPFS_UNCOMPRESSED_SIZE 8
353 #define DECMPFS_HEADER_SIZE 16
355 #define HFS_BLOCKS(s) ((s) >> 12)
358 static int la_opendirat(int, const char *);
359 static int la_mktemp(struct archive_write_disk *);
360 static void fsobj_error(int *, struct archive_string *, int, const char *,
362 static int check_symlinks_fsobj(char *, int *, struct archive_string *,
364 static int check_symlinks(struct archive_write_disk *);
365 static int create_filesystem_object(struct archive_write_disk *);
366 static struct fixup_entry *current_fixup(struct archive_write_disk *,
367 const char *pathname);
368 #if defined(HAVE_FCHDIR) && defined(PATH_MAX)
369 static void edit_deep_directories(struct archive_write_disk *ad);
371 static int cleanup_pathname_fsobj(char *, int *, struct archive_string *,
373 static int cleanup_pathname(struct archive_write_disk *);
374 static int create_dir(struct archive_write_disk *, char *);
375 static int create_parent_dir(struct archive_write_disk *, char *);
376 static ssize_t hfs_write_data_block(struct archive_write_disk *,
377 const char *, size_t);
378 static int fixup_appledouble(struct archive_write_disk *, const char *);
379 static int older(struct stat *, struct archive_entry *);
380 static int restore_entry(struct archive_write_disk *);
381 static int set_mac_metadata(struct archive_write_disk *, const char *,
382 const void *, size_t);
383 static int set_xattrs(struct archive_write_disk *);
384 static int clear_nochange_fflags(struct archive_write_disk *);
385 static int set_fflags(struct archive_write_disk *);
386 static int set_fflags_platform(struct archive_write_disk *, int fd,
387 const char *name, mode_t mode,
388 unsigned long fflags_set, unsigned long fflags_clear);
389 static int set_ownership(struct archive_write_disk *);
390 static int set_mode(struct archive_write_disk *, int mode);
391 static int set_time(int, int, const char *, time_t, long, time_t, long);
392 static int set_times(struct archive_write_disk *, int, int, const char *,
393 time_t, long, time_t, long, time_t, long, time_t, long);
394 static int set_times_from_entry(struct archive_write_disk *);
395 static struct fixup_entry *sort_dir_list(struct fixup_entry *p);
396 static ssize_t write_data_block(struct archive_write_disk *,
397 const char *, size_t);
399 static struct archive_vtable *archive_write_disk_vtable(void);
401 static int _archive_write_disk_close(struct archive *);
402 static int _archive_write_disk_free(struct archive *);
403 static int _archive_write_disk_header(struct archive *,
404 struct archive_entry *);
405 static int64_t _archive_write_disk_filter_bytes(struct archive *, int);
406 static int _archive_write_disk_finish_entry(struct archive *);
407 static ssize_t _archive_write_disk_data(struct archive *, const void *,
409 static ssize_t _archive_write_disk_data_block(struct archive *, const void *,
413 la_mktemp(struct archive_write_disk *a)
418 archive_string_empty(&a->_tmpname_data);
419 archive_string_sprintf(&a->_tmpname_data, "%s.XXXXXX", a->name);
420 a->tmpname = a->_tmpname_data.s;
422 fd = __archive_mkstemp(a->tmpname);
426 mode = a->mode & 0777 & ~a->user_umask;
427 if (fchmod(fd, mode) == -1) {
437 la_opendirat(int fd, const char *path) {
438 const int flags = O_CLOEXEC
439 #if defined(O_BINARY)
442 #if defined(O_DIRECTORY)
447 #elif defined(O_SEARCH)
449 #elif defined(__FreeBSD__) && defined(O_EXEC)
456 #if !defined(HAVE_OPENAT)
457 if (fd != AT_FDCWD) {
461 return (open(path, flags));
463 return (openat(fd, path, flags));
468 lazy_stat(struct archive_write_disk *a)
470 if (a->pst != NULL) {
471 /* Already have stat() data available. */
475 if (a->fd >= 0 && fstat(a->fd, &a->st) == 0) {
481 * XXX At this point, symlinks should not be hit, otherwise
482 * XXX a race occurred. Do we want to check explicitly for that?
484 if (lstat(a->name, &a->st) == 0) {
488 archive_set_error(&a->archive, errno, "Couldn't stat file");
489 return (ARCHIVE_WARN);
492 static struct archive_vtable *
493 archive_write_disk_vtable(void)
495 static struct archive_vtable av;
496 static int inited = 0;
499 av.archive_close = _archive_write_disk_close;
500 av.archive_filter_bytes = _archive_write_disk_filter_bytes;
501 av.archive_free = _archive_write_disk_free;
502 av.archive_write_header = _archive_write_disk_header;
503 av.archive_write_finish_entry
504 = _archive_write_disk_finish_entry;
505 av.archive_write_data = _archive_write_disk_data;
506 av.archive_write_data_block = _archive_write_disk_data_block;
513 _archive_write_disk_filter_bytes(struct archive *_a, int n)
515 struct archive_write_disk *a = (struct archive_write_disk *)_a;
516 (void)n; /* UNUSED */
517 if (n == -1 || n == 0)
518 return (a->total_bytes_written);
524 archive_write_disk_set_options(struct archive *_a, int flags)
526 struct archive_write_disk *a = (struct archive_write_disk *)_a;
534 * Extract this entry to disk.
536 * TODO: Validate hardlinks. According to the standards, we're
537 * supposed to check each extracted hardlink and squawk if it refers
538 * to a file that we didn't restore. I'm not entirely convinced this
539 * is a good idea, but more importantly: Is there any way to validate
540 * hardlinks without keeping a complete list of filenames from the
541 * entire archive?? Ugh.
545 _archive_write_disk_header(struct archive *_a, struct archive_entry *entry)
547 struct archive_write_disk *a = (struct archive_write_disk *)_a;
548 struct fixup_entry *fe;
551 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
552 ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
553 "archive_write_disk_header");
554 archive_clear_error(&a->archive);
555 if (a->archive.state & ARCHIVE_STATE_DATA) {
556 r = _archive_write_disk_finish_entry(&a->archive);
557 if (r == ARCHIVE_FATAL)
561 /* Set up for this particular entry. */
563 a->current_fixup = NULL;
566 archive_entry_free(a->entry);
569 a->entry = archive_entry_clone(entry);
574 a->uid = a->user_uid;
575 a->mode = archive_entry_mode(a->entry);
576 if (archive_entry_size_is_set(a->entry))
577 a->filesize = archive_entry_size(a->entry);
580 archive_strcpy(&(a->_name_data), archive_entry_pathname(a->entry));
581 a->name = a->_name_data.s;
582 archive_clear_error(&a->archive);
585 * Clean up the requested path. This is necessary for correct
586 * dir restores; the dir restore logic otherwise gets messed
587 * up by nonsense like "dir/.".
589 ret = cleanup_pathname(a);
590 if (ret != ARCHIVE_OK)
594 * Query the umask so we get predictable mode settings.
595 * This gets done on every call to _write_header in case the
596 * user edits their umask during the extraction for some
599 umask(a->user_umask = umask(0));
601 /* Figure out what we need to do for this entry. */
602 a->todo = TODO_MODE_BASE;
603 if (a->flags & ARCHIVE_EXTRACT_PERM) {
604 a->todo |= TODO_MODE_FORCE; /* Be pushy about permissions. */
606 * SGID requires an extra "check" step because we
607 * cannot easily predict the GID that the system will
608 * assign. (Different systems assign GIDs to files
609 * based on a variety of criteria, including process
610 * credentials and the gid of the enclosing
611 * directory.) We can only restore the SGID bit if
612 * the file has the right GID, and we only know the
613 * GID if we either set it (see set_ownership) or if
614 * we've actually called stat() on the file after it
615 * was restored. Since there are several places at
616 * which we might verify the GID, we need a TODO bit
619 if (a->mode & S_ISGID)
620 a->todo |= TODO_SGID | TODO_SGID_CHECK;
622 * Verifying the SUID is simpler, but can still be
623 * done in multiple ways, hence the separate "check" bit.
625 if (a->mode & S_ISUID)
626 a->todo |= TODO_SUID | TODO_SUID_CHECK;
629 * User didn't request full permissions, so don't
630 * restore SUID, SGID bits and obey umask.
635 a->mode &= ~a->user_umask;
637 if (a->flags & ARCHIVE_EXTRACT_OWNER)
638 a->todo |= TODO_OWNER;
639 if (a->flags & ARCHIVE_EXTRACT_TIME)
640 a->todo |= TODO_TIMES;
641 if (a->flags & ARCHIVE_EXTRACT_ACL) {
642 #if ARCHIVE_ACL_DARWIN
644 * On MacOS, platform ACLs get stored in mac_metadata, too.
645 * If we intend to extract mac_metadata and it is present
646 * we skip extracting libarchive NFSv4 ACLs.
648 size_t metadata_size;
650 if ((a->flags & ARCHIVE_EXTRACT_MAC_METADATA) == 0 ||
651 archive_entry_mac_metadata(a->entry,
652 &metadata_size) == NULL || metadata_size == 0)
654 #if ARCHIVE_ACL_LIBRICHACL
656 * RichACLs are stored in an extended attribute.
657 * If we intend to extract extended attributes and have this
658 * attribute we skip extracting libarchive NFSv4 ACLs.
660 short extract_acls = 1;
661 if (a->flags & ARCHIVE_EXTRACT_XATTR && (
662 archive_entry_acl_types(a->entry) &
663 ARCHIVE_ENTRY_ACL_TYPE_NFS4)) {
664 const char *attr_name;
665 const void *attr_value;
667 int i = archive_entry_xattr_reset(a->entry);
669 archive_entry_xattr_next(a->entry, &attr_name,
670 &attr_value, &attr_size);
671 if (attr_name != NULL && attr_value != NULL &&
672 attr_size > 0 && strcmp(attr_name,
673 "trusted.richacl") == 0) {
681 #if ARCHIVE_ACL_DARWIN || ARCHIVE_ACL_LIBRICHACL
684 if (archive_entry_filetype(a->entry) == AE_IFDIR)
685 a->deferred |= TODO_ACLS;
687 a->todo |= TODO_ACLS;
688 #if ARCHIVE_ACL_DARWIN || ARCHIVE_ACL_LIBRICHACL
692 if (a->flags & ARCHIVE_EXTRACT_MAC_METADATA) {
693 if (archive_entry_filetype(a->entry) == AE_IFDIR)
694 a->deferred |= TODO_MAC_METADATA;
696 a->todo |= TODO_MAC_METADATA;
698 #if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_ZLIB_H)
699 if ((a->flags & ARCHIVE_EXTRACT_NO_HFS_COMPRESSION) == 0) {
700 unsigned long set, clear;
701 archive_entry_fflags(a->entry, &set, &clear);
702 if ((set & ~clear) & UF_COMPRESSED) {
703 a->todo |= TODO_HFS_COMPRESSION;
704 a->decmpfs_block_count = (unsigned)-1;
707 if ((a->flags & ARCHIVE_EXTRACT_HFS_COMPRESSION_FORCED) != 0 &&
708 (a->mode & AE_IFMT) == AE_IFREG && a->filesize > 0) {
709 a->todo |= TODO_HFS_COMPRESSION;
710 a->decmpfs_block_count = (unsigned)-1;
715 /* Check if the current file name is a type of the
716 * resource fork file. */
717 p = strrchr(a->name, '/');
722 if (p[0] == '.' && p[1] == '_') {
723 /* Do not compress "._XXX" files. */
724 a->todo &= ~TODO_HFS_COMPRESSION;
726 a->todo |= TODO_APPLEDOUBLE;
731 if (a->flags & ARCHIVE_EXTRACT_XATTR) {
732 #if ARCHIVE_XATTR_DARWIN
734 * On MacOS, extended attributes get stored in mac_metadata,
735 * too. If we intend to extract mac_metadata and it is present
736 * we skip extracting extended attributes.
738 size_t metadata_size;
740 if ((a->flags & ARCHIVE_EXTRACT_MAC_METADATA) == 0 ||
741 archive_entry_mac_metadata(a->entry,
742 &metadata_size) == NULL || metadata_size == 0)
744 a->todo |= TODO_XATTR;
746 if (a->flags & ARCHIVE_EXTRACT_FFLAGS)
747 a->todo |= TODO_FFLAGS;
748 if (a->flags & ARCHIVE_EXTRACT_SECURE_SYMLINKS) {
749 ret = check_symlinks(a);
750 if (ret != ARCHIVE_OK)
753 #if defined(HAVE_FCHDIR) && defined(PATH_MAX)
754 /* If path exceeds PATH_MAX, shorten the path. */
755 edit_deep_directories(a);
758 ret = restore_entry(a);
760 #if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_ZLIB_H)
762 * Check if the filesystem the file is restoring on supports
763 * HFS+ Compression. If not, cancel HFS+ Compression.
765 if (a->todo | TODO_HFS_COMPRESSION) {
767 * NOTE: UF_COMPRESSED is ignored even if the filesystem
768 * supports HFS+ Compression because the file should
769 * have at least an extended attribute "com.apple.decmpfs"
770 * before the flag is set to indicate that the file have
771 * been compressed. If the filesystem does not support
772 * HFS+ Compression the system call will fail.
774 if (a->fd < 0 || fchflags(a->fd, UF_COMPRESSED) != 0)
775 a->todo &= ~TODO_HFS_COMPRESSION;
780 * TODO: There are rumours that some extended attributes must
781 * be restored before file data is written. If this is true,
782 * then we either need to write all extended attributes both
783 * before and after restoring the data, or find some rule for
784 * determining which must go first and which last. Due to the
785 * many ways people are using xattrs, this may prove to be an
786 * intractable problem.
790 /* If we changed directory above, restore it here. */
791 if (a->restore_pwd >= 0) {
792 r = fchdir(a->restore_pwd);
794 archive_set_error(&a->archive, errno,
798 close(a->restore_pwd);
804 * Fixup uses the unedited pathname from archive_entry_pathname(),
805 * because it is relative to the base dir and the edited path
806 * might be relative to some intermediate dir as a result of the
807 * deep restore logic.
809 if (a->deferred & TODO_MODE) {
810 fe = current_fixup(a, archive_entry_pathname(entry));
812 return (ARCHIVE_FATAL);
813 fe->fixup |= TODO_MODE_BASE;
817 if ((a->deferred & TODO_TIMES)
818 && (archive_entry_mtime_is_set(entry)
819 || archive_entry_atime_is_set(entry))) {
820 fe = current_fixup(a, archive_entry_pathname(entry));
822 return (ARCHIVE_FATAL);
824 fe->fixup |= TODO_TIMES;
825 if (archive_entry_atime_is_set(entry)) {
826 fe->atime = archive_entry_atime(entry);
827 fe->atime_nanos = archive_entry_atime_nsec(entry);
829 /* If atime is unset, use start time. */
830 fe->atime = a->start_time;
833 if (archive_entry_mtime_is_set(entry)) {
834 fe->mtime = archive_entry_mtime(entry);
835 fe->mtime_nanos = archive_entry_mtime_nsec(entry);
837 /* If mtime is unset, use start time. */
838 fe->mtime = a->start_time;
841 if (archive_entry_birthtime_is_set(entry)) {
842 fe->birthtime = archive_entry_birthtime(entry);
843 fe->birthtime_nanos = archive_entry_birthtime_nsec(
846 /* If birthtime is unset, use mtime. */
847 fe->birthtime = fe->mtime;
848 fe->birthtime_nanos = fe->mtime_nanos;
852 if (a->deferred & TODO_ACLS) {
853 fe = current_fixup(a, archive_entry_pathname(entry));
855 return (ARCHIVE_FATAL);
856 fe->fixup |= TODO_ACLS;
857 archive_acl_copy(&fe->acl, archive_entry_acl(entry));
860 if (a->deferred & TODO_MAC_METADATA) {
861 const void *metadata;
862 size_t metadata_size;
863 metadata = archive_entry_mac_metadata(a->entry, &metadata_size);
864 if (metadata != NULL && metadata_size > 0) {
865 fe = current_fixup(a, archive_entry_pathname(entry));
867 return (ARCHIVE_FATAL);
868 fe->mac_metadata = malloc(metadata_size);
869 if (fe->mac_metadata != NULL) {
870 memcpy(fe->mac_metadata, metadata,
872 fe->mac_metadata_size = metadata_size;
873 fe->fixup |= TODO_MAC_METADATA;
878 if (a->deferred & TODO_FFLAGS) {
879 fe = current_fixup(a, archive_entry_pathname(entry));
881 return (ARCHIVE_FATAL);
882 fe->fixup |= TODO_FFLAGS;
883 /* TODO: Complete this.. defer fflags from below. */
886 /* We've created the object and are ready to pour data into it. */
887 if (ret >= ARCHIVE_WARN)
888 a->archive.state = ARCHIVE_STATE_DATA;
890 * If it's not open, tell our client not to try writing.
891 * In particular, dirs, links, etc, don't get written to.
894 archive_entry_set_size(entry, 0);
902 archive_write_disk_set_skip_file(struct archive *_a, la_int64_t d, la_int64_t i)
904 struct archive_write_disk *a = (struct archive_write_disk *)_a;
905 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
906 ARCHIVE_STATE_ANY, "archive_write_disk_set_skip_file");
907 a->skip_file_set = 1;
908 a->skip_file_dev = d;
909 a->skip_file_ino = i;
914 write_data_block(struct archive_write_disk *a, const char *buff, size_t size)
916 uint64_t start_size = size;
917 ssize_t bytes_written = 0;
918 ssize_t block_size = 0, bytes_to_write;
923 if (a->filesize == 0 || a->fd < 0) {
924 archive_set_error(&a->archive, 0,
925 "Attempt to write to an empty file");
926 return (ARCHIVE_WARN);
929 if (a->flags & ARCHIVE_EXTRACT_SPARSE) {
930 #if HAVE_STRUCT_STAT_ST_BLKSIZE
932 if ((r = lazy_stat(a)) != ARCHIVE_OK)
934 block_size = a->pst->st_blksize;
936 /* XXX TODO XXX Is there a more appropriate choice here ? */
937 /* This needn't match the filesystem allocation size. */
938 block_size = 16*1024;
942 /* If this write would run beyond the file size, truncate it. */
943 if (a->filesize >= 0 && (int64_t)(a->offset + size) > a->filesize)
944 start_size = size = (size_t)(a->filesize - a->offset);
946 /* Write the data. */
948 if (block_size == 0) {
949 bytes_to_write = size;
951 /* We're sparsifying the file. */
955 /* Skip leading zero bytes. */
956 for (p = buff, end = buff + size; p < end; ++p) {
960 a->offset += p - buff;
966 /* Calculate next block boundary after offset. */
968 = (a->offset / block_size + 1) * block_size;
970 /* If the adjusted write would cross block boundary,
971 * truncate it to the block boundary. */
972 bytes_to_write = size;
973 if (a->offset + bytes_to_write > block_end)
974 bytes_to_write = block_end - a->offset;
976 /* Seek if necessary to the specified offset. */
977 if (a->offset != a->fd_offset) {
978 if (lseek(a->fd, a->offset, SEEK_SET) < 0) {
979 archive_set_error(&a->archive, errno,
981 return (ARCHIVE_FATAL);
983 a->fd_offset = a->offset;
985 bytes_written = write(a->fd, buff, bytes_to_write);
986 if (bytes_written < 0) {
987 archive_set_error(&a->archive, errno, "Write failed");
988 return (ARCHIVE_WARN);
990 buff += bytes_written;
991 size -= bytes_written;
992 a->total_bytes_written += bytes_written;
993 a->offset += bytes_written;
994 a->fd_offset = a->offset;
996 return (start_size - size);
999 #if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_SYS_XATTR_H)\
1000 && defined(HAVE_ZLIB_H)
1003 * Set UF_COMPRESSED file flag.
1004 * This have to be called after hfs_write_decmpfs() because if the
1005 * file does not have "com.apple.decmpfs" xattr the flag is ignored.
1008 hfs_set_compressed_fflag(struct archive_write_disk *a)
1012 if ((r = lazy_stat(a)) != ARCHIVE_OK)
1015 a->st.st_flags |= UF_COMPRESSED;
1016 if (fchflags(a->fd, a->st.st_flags) != 0) {
1017 archive_set_error(&a->archive, errno,
1018 "Failed to set UF_COMPRESSED file flag");
1019 return (ARCHIVE_WARN);
1021 return (ARCHIVE_OK);
1025 * HFS+ Compression decmpfs
1027 * +------------------------------+ +0
1028 * | Magic(LE 4 bytes) |
1029 * +------------------------------+
1030 * | Type(LE 4 bytes) |
1031 * +------------------------------+
1032 * | Uncompressed size(LE 8 bytes)|
1033 * +------------------------------+ +16
1035 * | Compressed data |
1036 * | (Placed only if Type == 3) |
1038 * +------------------------------+ +3802 = MAX_DECMPFS_XATTR_SIZE
1040 * Type is 3: decmpfs has compressed data.
1041 * Type is 4: Resource Fork has compressed data.
1044 * Write "com.apple.decmpfs"
1047 hfs_write_decmpfs(struct archive_write_disk *a)
1050 uint32_t compression_type;
1052 r = fsetxattr(a->fd, DECMPFS_XATTR_NAME, a->decmpfs_header_p,
1053 a->decmpfs_attr_size, 0, 0);
1055 archive_set_error(&a->archive, errno,
1056 "Cannot restore xattr:%s", DECMPFS_XATTR_NAME);
1057 compression_type = archive_le32dec(
1058 &a->decmpfs_header_p[DECMPFS_COMPRESSION_TYPE]);
1059 if (compression_type == CMP_RESOURCE_FORK)
1060 fremovexattr(a->fd, XATTR_RESOURCEFORK_NAME,
1061 XATTR_SHOWCOMPRESSION);
1062 return (ARCHIVE_WARN);
1064 return (ARCHIVE_OK);
1068 * HFS+ Compression Resource Fork
1070 * +-----------------------------+
1071 * | Header(260 bytes) |
1072 * +-----------------------------+
1073 * | Block count(LE 4 bytes) |
1074 * +-----------------------------+ --+
1075 * +-- | Offset (LE 4 bytes) | |
1076 * | | [distance from Block count] | | Block 0
1077 * | +-----------------------------+ |
1078 * | | Compressed size(LE 4 bytes) | |
1079 * | +-----------------------------+ --+
1081 * | | .................. |
1083 * | +-----------------------------+ --+
1084 * | | Offset (LE 4 bytes) | |
1085 * | +-----------------------------+ | Block (Block count -1)
1086 * | | Compressed size(LE 4 bytes) | |
1087 * +-> +-----------------------------+ --+
1088 * | Compressed data(n bytes) | Block 0
1089 * +-----------------------------+
1091 * | .................. |
1093 * +-----------------------------+
1094 * | Compressed data(n bytes) | Block (Block count -1)
1095 * +-----------------------------+
1096 * | Footer(50 bytes) |
1097 * +-----------------------------+
1101 * Write the header of "com.apple.ResourceFork"
1104 hfs_write_resource_fork(struct archive_write_disk *a, unsigned char *buff,
1105 size_t bytes, uint32_t position)
1109 ret = fsetxattr(a->fd, XATTR_RESOURCEFORK_NAME, buff, bytes,
1110 position, a->rsrc_xattr_options);
1112 archive_set_error(&a->archive, errno,
1113 "Cannot restore xattr: %s at %u pos %u bytes",
1114 XATTR_RESOURCEFORK_NAME,
1117 return (ARCHIVE_WARN);
1119 a->rsrc_xattr_options &= ~XATTR_CREATE;
1120 return (ARCHIVE_OK);
1124 hfs_write_compressed_data(struct archive_write_disk *a, size_t bytes_compressed)
1128 ret = hfs_write_resource_fork(a, a->compressed_buffer,
1129 bytes_compressed, a->compressed_rsrc_position);
1130 if (ret == ARCHIVE_OK)
1131 a->compressed_rsrc_position += bytes_compressed;
1136 hfs_write_resource_fork_header(struct archive_write_disk *a)
1138 unsigned char *buff;
1139 uint32_t rsrc_bytes;
1140 uint32_t rsrc_header_bytes;
1143 * Write resource fork header + block info.
1145 buff = a->resource_fork;
1146 rsrc_bytes = a->compressed_rsrc_position - RSRC_F_SIZE;
1148 RSRC_H_SIZE + /* Header base size. */
1149 4 + /* Block count. */
1150 (a->decmpfs_block_count * 8);/* Block info */
1151 archive_be32enc(buff, 0x100);
1152 archive_be32enc(buff + 4, rsrc_bytes);
1153 archive_be32enc(buff + 8, rsrc_bytes - 256);
1154 archive_be32enc(buff + 12, 0x32);
1155 memset(buff + 16, 0, 240);
1156 archive_be32enc(buff + 256, rsrc_bytes - 260);
1157 return hfs_write_resource_fork(a, buff, rsrc_header_bytes, 0);
1161 hfs_set_resource_fork_footer(unsigned char *buff, size_t buff_size)
1163 static const char rsrc_footer[RSRC_F_SIZE] = {
1164 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1165 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1166 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1167 0x00, 0x1c, 0x00, 0x32, 0x00, 0x00, 'c', 'm',
1168 'p', 'f', 0x00, 0x00, 0x00, 0x0a, 0x00, 0x01,
1169 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
1172 if (buff_size < sizeof(rsrc_footer))
1174 memcpy(buff, rsrc_footer, sizeof(rsrc_footer));
1175 return (sizeof(rsrc_footer));
1179 hfs_reset_compressor(struct archive_write_disk *a)
1183 if (a->stream_valid)
1184 ret = deflateReset(&a->stream);
1186 ret = deflateInit(&a->stream, a->decmpfs_compression_level);
1189 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1190 "Failed to initialize compressor");
1191 return (ARCHIVE_FATAL);
1193 a->stream_valid = 1;
1195 return (ARCHIVE_OK);
1199 hfs_decompress(struct archive_write_disk *a)
1201 uint32_t *block_info;
1202 unsigned int block_count;
1203 uint32_t data_pos, data_size;
1205 ssize_t bytes_written, bytes_to_write;
1208 block_info = (uint32_t *)(a->resource_fork + RSRC_H_SIZE);
1209 block_count = archive_le32dec(block_info++);
1210 while (block_count--) {
1211 data_pos = RSRC_H_SIZE + archive_le32dec(block_info++);
1212 data_size = archive_le32dec(block_info++);
1213 r = fgetxattr(a->fd, XATTR_RESOURCEFORK_NAME,
1214 a->compressed_buffer, data_size, data_pos, 0);
1215 if (r != data_size) {
1216 archive_set_error(&a->archive,
1217 (r < 0)?errno:ARCHIVE_ERRNO_MISC,
1218 "Failed to read resource fork");
1219 return (ARCHIVE_WARN);
1221 if (a->compressed_buffer[0] == 0xff) {
1222 bytes_to_write = data_size -1;
1223 b = a->compressed_buffer + 1;
1225 uLong dest_len = MAX_DECMPFS_BLOCK_SIZE;
1228 zr = uncompress((Bytef *)a->uncompressed_buffer,
1229 &dest_len, a->compressed_buffer, data_size);
1231 archive_set_error(&a->archive,
1233 "Failed to decompress resource fork");
1234 return (ARCHIVE_WARN);
1236 bytes_to_write = dest_len;
1237 b = (unsigned char *)a->uncompressed_buffer;
1240 bytes_written = write(a->fd, b, bytes_to_write);
1241 if (bytes_written < 0) {
1242 archive_set_error(&a->archive, errno,
1244 return (ARCHIVE_WARN);
1246 bytes_to_write -= bytes_written;
1248 } while (bytes_to_write > 0);
1250 r = fremovexattr(a->fd, XATTR_RESOURCEFORK_NAME, 0);
1252 archive_set_error(&a->archive, errno,
1253 "Failed to remove resource fork");
1254 return (ARCHIVE_WARN);
1256 return (ARCHIVE_OK);
1260 hfs_drive_compressor(struct archive_write_disk *a, const char *buff,
1263 unsigned char *buffer_compressed;
1264 size_t bytes_compressed;
1268 ret = hfs_reset_compressor(a);
1269 if (ret != ARCHIVE_OK)
1272 if (a->compressed_buffer == NULL) {
1275 block_size = COMPRESSED_W_SIZE + RSRC_F_SIZE +
1276 + compressBound(MAX_DECMPFS_BLOCK_SIZE);
1277 a->compressed_buffer = malloc(block_size);
1278 if (a->compressed_buffer == NULL) {
1279 archive_set_error(&a->archive, ENOMEM,
1280 "Can't allocate memory for Resource Fork");
1281 return (ARCHIVE_FATAL);
1283 a->compressed_buffer_size = block_size;
1284 a->compressed_buffer_remaining = block_size;
1287 buffer_compressed = a->compressed_buffer +
1288 a->compressed_buffer_size - a->compressed_buffer_remaining;
1289 a->stream.next_in = (Bytef *)(uintptr_t)(const void *)buff;
1290 a->stream.avail_in = size;
1291 a->stream.next_out = buffer_compressed;
1292 a->stream.avail_out = a->compressed_buffer_remaining;
1294 ret = deflate(&a->stream, Z_FINISH);
1300 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1301 "Failed to compress data");
1302 return (ARCHIVE_FAILED);
1304 } while (ret == Z_OK);
1305 bytes_compressed = a->compressed_buffer_remaining - a->stream.avail_out;
1308 * If the compressed size is larger than the original size,
1309 * throw away compressed data, use uncompressed data instead.
1311 if (bytes_compressed > size) {
1312 buffer_compressed[0] = 0xFF;/* uncompressed marker. */
1313 memcpy(buffer_compressed + 1, buff, size);
1314 bytes_compressed = size + 1;
1316 a->compressed_buffer_remaining -= bytes_compressed;
1319 * If the compressed size is smaller than MAX_DECMPFS_XATTR_SIZE
1320 * and the block count in the file is only one, store compressed
1321 * data to decmpfs xattr instead of the resource fork.
1323 if (a->decmpfs_block_count == 1 &&
1324 (a->decmpfs_attr_size + bytes_compressed)
1325 <= MAX_DECMPFS_XATTR_SIZE) {
1326 archive_le32enc(&a->decmpfs_header_p[DECMPFS_COMPRESSION_TYPE],
1328 memcpy(a->decmpfs_header_p + DECMPFS_HEADER_SIZE,
1329 buffer_compressed, bytes_compressed);
1330 a->decmpfs_attr_size += bytes_compressed;
1331 a->compressed_buffer_remaining = a->compressed_buffer_size;
1333 * Finish HFS+ Compression.
1334 * - Write the decmpfs xattr.
1335 * - Set the UF_COMPRESSED file flag.
1337 ret = hfs_write_decmpfs(a);
1338 if (ret == ARCHIVE_OK)
1339 ret = hfs_set_compressed_fflag(a);
1343 /* Update block info. */
1344 archive_le32enc(a->decmpfs_block_info++,
1345 a->compressed_rsrc_position_v - RSRC_H_SIZE);
1346 archive_le32enc(a->decmpfs_block_info++, bytes_compressed);
1347 a->compressed_rsrc_position_v += bytes_compressed;
1350 * Write the compressed data to the resource fork.
1352 bytes_used = a->compressed_buffer_size - a->compressed_buffer_remaining;
1353 while (bytes_used >= COMPRESSED_W_SIZE) {
1354 ret = hfs_write_compressed_data(a, COMPRESSED_W_SIZE);
1355 if (ret != ARCHIVE_OK)
1357 bytes_used -= COMPRESSED_W_SIZE;
1358 if (bytes_used > COMPRESSED_W_SIZE)
1359 memmove(a->compressed_buffer,
1360 a->compressed_buffer + COMPRESSED_W_SIZE,
1363 memcpy(a->compressed_buffer,
1364 a->compressed_buffer + COMPRESSED_W_SIZE,
1367 a->compressed_buffer_remaining = a->compressed_buffer_size - bytes_used;
1370 * If the current block is the last block, write the remaining
1371 * compressed data and the resource fork footer.
1373 if (a->file_remaining_bytes == 0) {
1377 /* Append the resource footer. */
1378 rsrc_size = hfs_set_resource_fork_footer(
1379 a->compressed_buffer + bytes_used,
1380 a->compressed_buffer_remaining);
1381 ret = hfs_write_compressed_data(a, bytes_used + rsrc_size);
1382 a->compressed_buffer_remaining = a->compressed_buffer_size;
1384 /* If the compressed size is not enough smaller than
1385 * the uncompressed size. cancel HFS+ compression.
1386 * TODO: study a behavior of ditto utility and improve
1387 * the condition to fall back into no HFS+ compression. */
1388 bk = HFS_BLOCKS(a->compressed_rsrc_position);
1390 if (bk > HFS_BLOCKS(a->filesize))
1391 return hfs_decompress(a);
1393 * Write the resourcefork header.
1395 if (ret == ARCHIVE_OK)
1396 ret = hfs_write_resource_fork_header(a);
1398 * Finish HFS+ Compression.
1399 * - Write the decmpfs xattr.
1400 * - Set the UF_COMPRESSED file flag.
1402 if (ret == ARCHIVE_OK)
1403 ret = hfs_write_decmpfs(a);
1404 if (ret == ARCHIVE_OK)
1405 ret = hfs_set_compressed_fflag(a);
1411 hfs_write_decmpfs_block(struct archive_write_disk *a, const char *buff,
1414 const char *buffer_to_write;
1415 size_t bytes_to_write;
1418 if (a->decmpfs_block_count == (unsigned)-1) {
1421 unsigned int block_count;
1423 if (a->decmpfs_header_p == NULL) {
1424 new_block = malloc(MAX_DECMPFS_XATTR_SIZE
1425 + sizeof(uint32_t));
1426 if (new_block == NULL) {
1427 archive_set_error(&a->archive, ENOMEM,
1428 "Can't allocate memory for decmpfs");
1429 return (ARCHIVE_FATAL);
1431 a->decmpfs_header_p = new_block;
1433 a->decmpfs_attr_size = DECMPFS_HEADER_SIZE;
1434 archive_le32enc(&a->decmpfs_header_p[DECMPFS_COMPRESSION_MAGIC],
1436 archive_le32enc(&a->decmpfs_header_p[DECMPFS_COMPRESSION_TYPE],
1438 archive_le64enc(&a->decmpfs_header_p[DECMPFS_UNCOMPRESSED_SIZE],
1441 /* Calculate a block count of the file. */
1443 (a->filesize + MAX_DECMPFS_BLOCK_SIZE -1) /
1444 MAX_DECMPFS_BLOCK_SIZE;
1446 * Allocate buffer for resource fork.
1447 * Set up related pointers;
1450 RSRC_H_SIZE + /* header */
1451 4 + /* Block count */
1452 (block_count * sizeof(uint32_t) * 2) +
1453 RSRC_F_SIZE; /* footer */
1454 if (new_size > a->resource_fork_allocated_size) {
1455 new_block = realloc(a->resource_fork, new_size);
1456 if (new_block == NULL) {
1457 archive_set_error(&a->archive, ENOMEM,
1458 "Can't allocate memory for ResourceFork");
1459 return (ARCHIVE_FATAL);
1461 a->resource_fork_allocated_size = new_size;
1462 a->resource_fork = new_block;
1465 /* Allocate uncompressed buffer */
1466 if (a->uncompressed_buffer == NULL) {
1467 new_block = malloc(MAX_DECMPFS_BLOCK_SIZE);
1468 if (new_block == NULL) {
1469 archive_set_error(&a->archive, ENOMEM,
1470 "Can't allocate memory for decmpfs");
1471 return (ARCHIVE_FATAL);
1473 a->uncompressed_buffer = new_block;
1475 a->block_remaining_bytes = MAX_DECMPFS_BLOCK_SIZE;
1476 a->file_remaining_bytes = a->filesize;
1477 a->compressed_buffer_remaining = a->compressed_buffer_size;
1480 * Set up a resource fork.
1482 a->rsrc_xattr_options = XATTR_CREATE;
1483 /* Get the position where we are going to set a bunch
1485 a->decmpfs_block_info =
1486 (uint32_t *)(a->resource_fork + RSRC_H_SIZE);
1487 /* Set the block count to the resource fork. */
1488 archive_le32enc(a->decmpfs_block_info++, block_count);
1489 /* Get the position where we are going to set compressed
1491 a->compressed_rsrc_position =
1492 RSRC_H_SIZE + 4 + (block_count * 8);
1493 a->compressed_rsrc_position_v = a->compressed_rsrc_position;
1494 a->decmpfs_block_count = block_count;
1497 /* Ignore redundant bytes. */
1498 if (a->file_remaining_bytes == 0)
1499 return ((ssize_t)size);
1501 /* Do not overrun a block size. */
1502 if (size > a->block_remaining_bytes)
1503 bytes_to_write = a->block_remaining_bytes;
1505 bytes_to_write = size;
1506 /* Do not overrun the file size. */
1507 if (bytes_to_write > a->file_remaining_bytes)
1508 bytes_to_write = a->file_remaining_bytes;
1510 /* For efficiency, if a copy length is full of the uncompressed
1511 * buffer size, do not copy writing data to it. */
1512 if (bytes_to_write == MAX_DECMPFS_BLOCK_SIZE)
1513 buffer_to_write = buff;
1515 memcpy(a->uncompressed_buffer +
1516 MAX_DECMPFS_BLOCK_SIZE - a->block_remaining_bytes,
1517 buff, bytes_to_write);
1518 buffer_to_write = a->uncompressed_buffer;
1520 a->block_remaining_bytes -= bytes_to_write;
1521 a->file_remaining_bytes -= bytes_to_write;
1523 if (a->block_remaining_bytes == 0 || a->file_remaining_bytes == 0) {
1524 ret = hfs_drive_compressor(a, buffer_to_write,
1525 MAX_DECMPFS_BLOCK_SIZE - a->block_remaining_bytes);
1528 a->block_remaining_bytes = MAX_DECMPFS_BLOCK_SIZE;
1530 /* Ignore redundant bytes. */
1531 if (a->file_remaining_bytes == 0)
1532 return ((ssize_t)size);
1533 return (bytes_to_write);
1537 hfs_write_data_block(struct archive_write_disk *a, const char *buff,
1540 uint64_t start_size = size;
1541 ssize_t bytes_written = 0;
1542 ssize_t bytes_to_write;
1545 return (ARCHIVE_OK);
1547 if (a->filesize == 0 || a->fd < 0) {
1548 archive_set_error(&a->archive, 0,
1549 "Attempt to write to an empty file");
1550 return (ARCHIVE_WARN);
1553 /* If this write would run beyond the file size, truncate it. */
1554 if (a->filesize >= 0 && (int64_t)(a->offset + size) > a->filesize)
1555 start_size = size = (size_t)(a->filesize - a->offset);
1557 /* Write the data. */
1559 bytes_to_write = size;
1560 /* Seek if necessary to the specified offset. */
1561 if (a->offset < a->fd_offset) {
1562 /* Can't support backward move. */
1563 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1565 return (ARCHIVE_FATAL);
1566 } else if (a->offset > a->fd_offset) {
1567 int64_t skip = a->offset - a->fd_offset;
1568 char nullblock[1024];
1570 memset(nullblock, 0, sizeof(nullblock));
1572 if (skip > (int64_t)sizeof(nullblock))
1573 bytes_written = hfs_write_decmpfs_block(
1574 a, nullblock, sizeof(nullblock));
1576 bytes_written = hfs_write_decmpfs_block(
1577 a, nullblock, skip);
1578 if (bytes_written < 0) {
1579 archive_set_error(&a->archive, errno,
1581 return (ARCHIVE_WARN);
1583 skip -= bytes_written;
1586 a->fd_offset = a->offset;
1589 hfs_write_decmpfs_block(a, buff, bytes_to_write);
1590 if (bytes_written < 0)
1591 return (bytes_written);
1592 buff += bytes_written;
1593 size -= bytes_written;
1594 a->total_bytes_written += bytes_written;
1595 a->offset += bytes_written;
1596 a->fd_offset = a->offset;
1598 return (start_size - size);
1602 hfs_write_data_block(struct archive_write_disk *a, const char *buff,
1605 return (write_data_block(a, buff, size));
1610 _archive_write_disk_data_block(struct archive *_a,
1611 const void *buff, size_t size, int64_t offset)
1613 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1616 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1617 ARCHIVE_STATE_DATA, "archive_write_data_block");
1620 if (a->todo & TODO_HFS_COMPRESSION)
1621 r = hfs_write_data_block(a, buff, size);
1623 r = write_data_block(a, buff, size);
1626 if ((size_t)r < size) {
1627 archive_set_error(&a->archive, 0,
1628 "Too much data: Truncating file at %ju bytes",
1629 (uintmax_t)a->filesize);
1630 return (ARCHIVE_WARN);
1632 #if ARCHIVE_VERSION_NUMBER < 3999000
1633 return (ARCHIVE_OK);
1640 _archive_write_disk_data(struct archive *_a, const void *buff, size_t size)
1642 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1644 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1645 ARCHIVE_STATE_DATA, "archive_write_data");
1647 if (a->todo & TODO_HFS_COMPRESSION)
1648 return (hfs_write_data_block(a, buff, size));
1649 return (write_data_block(a, buff, size));
1653 _archive_write_disk_finish_entry(struct archive *_a)
1655 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1656 int ret = ARCHIVE_OK;
1658 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1659 ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
1660 "archive_write_finish_entry");
1661 if (a->archive.state & ARCHIVE_STATE_HEADER)
1662 return (ARCHIVE_OK);
1663 archive_clear_error(&a->archive);
1665 /* Pad or truncate file to the right size. */
1667 /* There's no file. */
1668 } else if (a->filesize < 0) {
1669 /* File size is unknown, so we can't set the size. */
1670 } else if (a->fd_offset == a->filesize) {
1671 /* Last write ended at exactly the filesize; we're done. */
1672 /* Hopefully, this is the common case. */
1673 #if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_ZLIB_H)
1674 } else if (a->todo & TODO_HFS_COMPRESSION) {
1678 if (a->file_remaining_bytes)
1679 memset(null_d, 0, sizeof(null_d));
1680 while (a->file_remaining_bytes) {
1681 if (a->file_remaining_bytes > sizeof(null_d))
1682 r = hfs_write_data_block(
1683 a, null_d, sizeof(null_d));
1685 r = hfs_write_data_block(
1686 a, null_d, a->file_remaining_bytes);
1693 if (ftruncate(a->fd, a->filesize) == -1 &&
1695 archive_set_error(&a->archive, errno,
1696 "File size could not be restored");
1697 return (ARCHIVE_FAILED);
1701 * Not all platforms implement the XSI option to
1702 * extend files via ftruncate. Stat() the file again
1703 * to see what happened.
1706 if ((ret = lazy_stat(a)) != ARCHIVE_OK)
1708 /* We can use lseek()/write() to extend the file if
1709 * ftruncate didn't work or isn't available. */
1710 if (a->st.st_size < a->filesize) {
1711 const char nul = '\0';
1712 if (lseek(a->fd, a->filesize - 1, SEEK_SET) < 0) {
1713 archive_set_error(&a->archive, errno,
1715 return (ARCHIVE_FATAL);
1717 if (write(a->fd, &nul, 1) < 0) {
1718 archive_set_error(&a->archive, errno,
1719 "Write to restore size failed");
1720 return (ARCHIVE_FATAL);
1726 /* Restore metadata. */
1729 * This is specific to Mac OS X.
1730 * If the current file is an AppleDouble file, it should be
1731 * linked with the data fork file and remove it.
1733 if (a->todo & TODO_APPLEDOUBLE) {
1734 int r2 = fixup_appledouble(a, a->name);
1735 if (r2 == ARCHIVE_EOF) {
1736 /* The current file has been successfully linked
1737 * with the data fork file and removed. So there
1738 * is nothing to do on the current file. */
1739 goto finish_metadata;
1741 if (r2 < ret) ret = r2;
1745 * Look up the "real" UID only if we're going to need it.
1746 * TODO: the TODO_SGID condition can be dropped here, can't it?
1748 if (a->todo & (TODO_OWNER | TODO_SUID | TODO_SGID)) {
1749 a->uid = archive_write_disk_uid(&a->archive,
1750 archive_entry_uname(a->entry),
1751 archive_entry_uid(a->entry));
1753 /* Look up the "real" GID only if we're going to need it. */
1754 /* TODO: the TODO_SUID condition can be dropped here, can't it? */
1755 if (a->todo & (TODO_OWNER | TODO_SGID | TODO_SUID)) {
1756 a->gid = archive_write_disk_gid(&a->archive,
1757 archive_entry_gname(a->entry),
1758 archive_entry_gid(a->entry));
1762 * Restore ownership before set_mode tries to restore suid/sgid
1763 * bits. If we set the owner, we know what it is and can skip
1764 * a stat() call to examine the ownership of the file on disk.
1766 if (a->todo & TODO_OWNER) {
1767 int r2 = set_ownership(a);
1768 if (r2 < ret) ret = r2;
1772 * set_mode must precede ACLs on systems such as Solaris and
1773 * FreeBSD where setting the mode implicitly clears extended ACLs
1775 if (a->todo & TODO_MODE) {
1776 int r2 = set_mode(a, a->mode);
1777 if (r2 < ret) ret = r2;
1781 * Security-related extended attributes (such as
1782 * security.capability on Linux) have to be restored last,
1783 * since they're implicitly removed by other file changes.
1785 if (a->todo & TODO_XATTR) {
1786 int r2 = set_xattrs(a);
1787 if (r2 < ret) ret = r2;
1791 * Some flags prevent file modification; they must be restored after
1792 * file contents are written.
1794 if (a->todo & TODO_FFLAGS) {
1795 int r2 = set_fflags(a);
1796 if (r2 < ret) ret = r2;
1800 * Time must follow most other metadata;
1801 * otherwise atime will get changed.
1803 if (a->todo & TODO_TIMES) {
1804 int r2 = set_times_from_entry(a);
1805 if (r2 < ret) ret = r2;
1809 * Mac extended metadata includes ACLs.
1811 if (a->todo & TODO_MAC_METADATA) {
1812 const void *metadata;
1813 size_t metadata_size;
1814 metadata = archive_entry_mac_metadata(a->entry, &metadata_size);
1815 if (metadata != NULL && metadata_size > 0) {
1816 int r2 = set_mac_metadata(a, archive_entry_pathname(
1817 a->entry), metadata, metadata_size);
1818 if (r2 < ret) ret = r2;
1823 * ACLs must be restored after timestamps because there are
1824 * ACLs that prevent attribute changes (including time).
1826 if (a->todo & TODO_ACLS) {
1828 r2 = archive_write_disk_set_acls(&a->archive, a->fd,
1829 archive_entry_pathname(a->entry),
1830 archive_entry_acl(a->entry),
1831 archive_entry_mode(a->entry));
1832 if (r2 < ret) ret = r2;
1836 /* If there's an fd, we can close it now. */
1841 if (rename(a->tmpname, a->name) == -1) {
1842 archive_set_error(&a->archive, errno,
1844 ret = ARCHIVE_FATAL;
1849 /* If there's an entry, we can release it now. */
1850 archive_entry_free(a->entry);
1852 a->archive.state = ARCHIVE_STATE_HEADER;
1857 archive_write_disk_set_group_lookup(struct archive *_a,
1859 la_int64_t (*lookup_gid)(void *private, const char *gname, la_int64_t gid),
1860 void (*cleanup_gid)(void *private))
1862 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1863 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1864 ARCHIVE_STATE_ANY, "archive_write_disk_set_group_lookup");
1866 if (a->cleanup_gid != NULL && a->lookup_gid_data != NULL)
1867 (a->cleanup_gid)(a->lookup_gid_data);
1869 a->lookup_gid = lookup_gid;
1870 a->cleanup_gid = cleanup_gid;
1871 a->lookup_gid_data = private_data;
1872 return (ARCHIVE_OK);
1876 archive_write_disk_set_user_lookup(struct archive *_a,
1878 int64_t (*lookup_uid)(void *private, const char *uname, int64_t uid),
1879 void (*cleanup_uid)(void *private))
1881 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1882 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1883 ARCHIVE_STATE_ANY, "archive_write_disk_set_user_lookup");
1885 if (a->cleanup_uid != NULL && a->lookup_uid_data != NULL)
1886 (a->cleanup_uid)(a->lookup_uid_data);
1888 a->lookup_uid = lookup_uid;
1889 a->cleanup_uid = cleanup_uid;
1890 a->lookup_uid_data = private_data;
1891 return (ARCHIVE_OK);
1895 archive_write_disk_gid(struct archive *_a, const char *name, la_int64_t id)
1897 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1898 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1899 ARCHIVE_STATE_ANY, "archive_write_disk_gid");
1901 return (a->lookup_gid)(a->lookup_gid_data, name, id);
1906 archive_write_disk_uid(struct archive *_a, const char *name, la_int64_t id)
1908 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1909 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1910 ARCHIVE_STATE_ANY, "archive_write_disk_uid");
1912 return (a->lookup_uid)(a->lookup_uid_data, name, id);
1917 * Create a new archive_write_disk object and initialize it with global state.
1920 archive_write_disk_new(void)
1922 struct archive_write_disk *a;
1924 a = (struct archive_write_disk *)calloc(1, sizeof(*a));
1927 a->archive.magic = ARCHIVE_WRITE_DISK_MAGIC;
1928 /* We're ready to write a header immediately. */
1929 a->archive.state = ARCHIVE_STATE_HEADER;
1930 a->archive.vtable = archive_write_disk_vtable();
1931 a->start_time = time(NULL);
1932 /* Query and restore the umask. */
1933 umask(a->user_umask = umask(0));
1935 a->user_uid = geteuid();
1936 #endif /* HAVE_GETEUID */
1937 if (archive_string_ensure(&a->path_safe, 512) == NULL) {
1942 a->decmpfs_compression_level = 5;
1944 return (&a->archive);
1949 * If pathname is longer than PATH_MAX, chdir to a suitable
1950 * intermediate dir and edit the path down to a shorter suffix. Note
1951 * that this routine never returns an error; if the chdir() attempt
1952 * fails for any reason, we just go ahead with the long pathname. The
1953 * object creation is likely to fail, but any error will get handled
1956 #if defined(HAVE_FCHDIR) && defined(PATH_MAX)
1958 edit_deep_directories(struct archive_write_disk *a)
1961 char *tail = a->name;
1963 /* If path is short, avoid the open() below. */
1964 if (strlen(tail) < PATH_MAX)
1967 /* Try to record our starting dir. */
1968 a->restore_pwd = la_opendirat(AT_FDCWD, ".");
1969 __archive_ensure_cloexec_flag(a->restore_pwd);
1970 if (a->restore_pwd < 0)
1973 /* As long as the path is too long... */
1974 while (strlen(tail) >= PATH_MAX) {
1975 /* Locate a dir prefix shorter than PATH_MAX. */
1976 tail += PATH_MAX - 8;
1977 while (tail > a->name && *tail != '/')
1979 /* Exit if we find a too-long path component. */
1980 if (tail <= a->name)
1982 /* Create the intermediate dir and chdir to it. */
1983 *tail = '\0'; /* Terminate dir portion */
1984 ret = create_dir(a, a->name);
1985 if (ret == ARCHIVE_OK && chdir(a->name) != 0)
1986 ret = ARCHIVE_FAILED;
1987 *tail = '/'; /* Restore the / we removed. */
1988 if (ret != ARCHIVE_OK)
1991 /* The chdir() succeeded; we've now shortened the path. */
1999 * The main restore function.
2002 restore_entry(struct archive_write_disk *a)
2004 int ret = ARCHIVE_OK, en;
2006 if (a->flags & ARCHIVE_EXTRACT_UNLINK && !S_ISDIR(a->mode)) {
2008 * TODO: Fix this. Apparently, there are platforms
2009 * that still allow root to hose the entire filesystem
2010 * by unlinking a dir. The S_ISDIR() test above
2011 * prevents us from using unlink() here if the new
2012 * object is a dir, but that doesn't mean the old
2013 * object isn't a dir.
2015 if (a->flags & ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS)
2016 (void)clear_nochange_fflags(a);
2017 if (unlink(a->name) == 0) {
2018 /* We removed it, reset cached stat. */
2020 } else if (errno == ENOENT) {
2021 /* File didn't exist, that's just as good. */
2022 } else if (rmdir(a->name) == 0) {
2023 /* It was a dir, but now it's gone. */
2026 /* We tried, but couldn't get rid of it. */
2027 archive_set_error(&a->archive, errno,
2028 "Could not unlink");
2029 return(ARCHIVE_FAILED);
2033 /* Try creating it first; if this fails, we'll try to recover. */
2034 en = create_filesystem_object(a);
2036 if ((en == ENOTDIR || en == ENOENT)
2037 && !(a->flags & ARCHIVE_EXTRACT_NO_AUTODIR)) {
2038 /* If the parent dir doesn't exist, try creating it. */
2039 create_parent_dir(a, a->name);
2040 /* Now try to create the object again. */
2041 en = create_filesystem_object(a);
2044 if ((en == ENOENT) && (archive_entry_hardlink(a->entry) != NULL)) {
2045 archive_set_error(&a->archive, en,
2046 "Hard-link target '%s' does not exist.",
2047 archive_entry_hardlink(a->entry));
2048 return (ARCHIVE_FAILED);
2051 if ((en == EISDIR || en == EEXIST)
2052 && (a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
2053 /* If we're not overwriting, we're done. */
2054 if (S_ISDIR(a->mode)) {
2055 /* Don't overwrite any settings on existing directories. */
2058 archive_entry_unset_size(a->entry);
2059 return (ARCHIVE_OK);
2063 * Some platforms return EISDIR if you call
2064 * open(O_WRONLY | O_EXCL | O_CREAT) on a directory, some
2065 * return EEXIST. POSIX is ambiguous, requiring EISDIR
2066 * for open(O_WRONLY) on a dir and EEXIST for open(O_EXCL | O_CREAT)
2067 * on an existing item.
2070 /* A dir is in the way of a non-dir, rmdir it. */
2071 if (rmdir(a->name) != 0) {
2072 archive_set_error(&a->archive, errno,
2073 "Can't remove already-existing dir");
2074 return (ARCHIVE_FAILED);
2078 en = create_filesystem_object(a);
2079 } else if (en == EEXIST) {
2081 * We know something is in the way, but we don't know what;
2082 * we need to find out before we go any further.
2086 * The SECURE_SYMLINKS logic has already removed a
2087 * symlink to a dir if the client wants that. So
2088 * follow the symlink if we're creating a dir.
2090 if (S_ISDIR(a->mode))
2091 r = la_stat(a->name, &a->st);
2093 * If it's not a dir (or it's a broken symlink),
2094 * then don't follow it.
2096 if (r != 0 || !S_ISDIR(a->mode))
2097 r = lstat(a->name, &a->st);
2099 archive_set_error(&a->archive, errno,
2100 "Can't stat existing object");
2101 return (ARCHIVE_FAILED);
2105 * NO_OVERWRITE_NEWER doesn't apply to directories.
2107 if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER)
2108 && !S_ISDIR(a->st.st_mode)) {
2109 if (!older(&(a->st), a->entry)) {
2110 archive_entry_unset_size(a->entry);
2111 return (ARCHIVE_OK);
2115 /* If it's our archive, we're done. */
2116 if (a->skip_file_set &&
2117 a->st.st_dev == (dev_t)a->skip_file_dev &&
2118 a->st.st_ino == (ino_t)a->skip_file_ino) {
2119 archive_set_error(&a->archive, 0,
2120 "Refusing to overwrite archive");
2121 return (ARCHIVE_FAILED);
2124 if (!S_ISDIR(a->st.st_mode)) {
2125 if (a->flags & ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS)
2126 (void)clear_nochange_fflags(a);
2128 if ((a->flags & ARCHIVE_EXTRACT_SAFE_WRITES) &&
2129 S_ISREG(a->st.st_mode)) {
2130 /* Use a temporary file to extract */
2131 if ((a->fd = la_mktemp(a)) == -1)
2132 return ARCHIVE_FAILED;
2136 /* A non-dir is in the way, unlink it. */
2137 if (unlink(a->name) != 0) {
2138 archive_set_error(&a->archive, errno,
2139 "Can't unlink already-existing "
2141 return (ARCHIVE_FAILED);
2145 en = create_filesystem_object(a);
2147 } else if (!S_ISDIR(a->mode)) {
2148 /* A dir is in the way of a non-dir, rmdir it. */
2149 if (a->flags & ARCHIVE_EXTRACT_CLEAR_NOCHANGE_FFLAGS)
2150 (void)clear_nochange_fflags(a);
2151 if (rmdir(a->name) != 0) {
2152 archive_set_error(&a->archive, errno,
2153 "Can't replace existing directory with non-directory");
2154 return (ARCHIVE_FAILED);
2157 en = create_filesystem_object(a);
2160 * There's a dir in the way of a dir. Don't
2161 * waste time with rmdir()/mkdir(), just fix
2162 * up the permissions on the existing dir.
2163 * Note that we don't change perms on existing
2164 * dirs unless _EXTRACT_PERM is specified.
2166 if ((a->mode != a->st.st_mode)
2167 && (a->todo & TODO_MODE_FORCE))
2168 a->deferred |= (a->todo & TODO_MODE);
2169 /* Ownership doesn't need deferred fixup. */
2170 en = 0; /* Forget the EEXIST. */
2175 /* Everything failed; give up here. */
2176 if ((&a->archive)->error == NULL)
2177 archive_set_error(&a->archive, en, "Can't create '%s'",
2179 return (ARCHIVE_FAILED);
2182 a->pst = NULL; /* Cached stat data no longer valid. */
2187 * Returns 0 if creation succeeds, or else returns errno value from
2188 * the failed system call. Note: This function should only ever perform
2189 * a single system call.
2192 create_filesystem_object(struct archive_write_disk *a)
2194 /* Create the entry. */
2195 const char *linkname;
2196 mode_t final_mode, mode;
2198 /* these for check_symlinks_fsobj */
2199 char *linkname_copy; /* non-const copy of linkname */
2201 struct archive_string error_string;
2204 /* We identify hard/symlinks according to the link names. */
2205 /* Since link(2) and symlink(2) don't handle modes, we're done here. */
2206 linkname = archive_entry_hardlink(a->entry);
2207 if (linkname != NULL) {
2211 archive_string_init(&error_string);
2212 linkname_copy = strdup(linkname);
2213 if (linkname_copy == NULL) {
2217 * TODO: consider using the cleaned-up path as the link
2220 r = cleanup_pathname_fsobj(linkname_copy, &error_number,
2221 &error_string, a->flags);
2222 if (r != ARCHIVE_OK) {
2223 archive_set_error(&a->archive, error_number, "%s",
2225 free(linkname_copy);
2226 archive_string_free(&error_string);
2228 * EPERM is more appropriate than error_number for our
2233 r = check_symlinks_fsobj(linkname_copy, &error_number,
2234 &error_string, a->flags);
2235 if (r != ARCHIVE_OK) {
2236 archive_set_error(&a->archive, error_number, "%s",
2238 free(linkname_copy);
2239 archive_string_free(&error_string);
2241 * EPERM is more appropriate than error_number for our
2246 free(linkname_copy);
2247 archive_string_free(&error_string);
2249 * Unlinking and linking here is really not atomic,
2250 * but doing it right, would require us to construct
2251 * an mktemplink() function, and then use rename(2).
2253 if (a->flags & ARCHIVE_EXTRACT_SAFE_WRITES)
2255 r = link(linkname, a->name) ? errno : 0;
2257 * New cpio and pax formats allow hardlink entries
2258 * to carry data, so we may have to open the file
2259 * for hardlink entries.
2261 * If the hardlink was successfully created and
2262 * the archive doesn't have carry data for it,
2263 * consider it to be non-authoritative for meta data.
2264 * This is consistent with GNU tar and BSD pax.
2265 * If the hardlink does carry data, let the last
2266 * archive entry decide ownership.
2268 if (r == 0 && a->filesize <= 0) {
2271 } else if (r == 0 && a->filesize > 0) {
2273 r = lstat(a->name, &st);
2275 r = la_stat(a->name, &st);
2279 else if ((st.st_mode & AE_IFMT) == AE_IFREG) {
2280 a->fd = open(a->name, O_WRONLY | O_TRUNC |
2281 O_BINARY | O_CLOEXEC | O_NOFOLLOW);
2282 __archive_ensure_cloexec_flag(a->fd);
2290 linkname = archive_entry_symlink(a->entry);
2291 if (linkname != NULL) {
2294 * Unlinking and linking here is really not atomic,
2295 * but doing it right, would require us to construct
2296 * an mktempsymlink() function, and then use rename(2).
2298 if (a->flags & ARCHIVE_EXTRACT_SAFE_WRITES)
2300 return symlink(linkname, a->name) ? errno : 0;
2307 * The remaining system calls all set permissions, so let's
2308 * try to take advantage of that to avoid an extra chmod()
2309 * call. (Recall that umask is set to zero right now!)
2312 /* Mode we want for the final restored object (w/o file type bits). */
2313 final_mode = a->mode & 07777;
2315 * The mode that will actually be restored in this step. Note
2316 * that SUID, SGID, etc, require additional work to ensure
2317 * security, so we never restore them at this point.
2319 mode = final_mode & 0777 & ~a->user_umask;
2321 switch (a->mode & AE_IFMT) {
2323 /* POSIX requires that we fall through here. */
2327 a->fd = open(a->name,
2328 O_WRONLY | O_CREAT | O_EXCL | O_BINARY | O_CLOEXEC, mode);
2329 __archive_ensure_cloexec_flag(a->fd);
2334 /* Note: we use AE_IFCHR for the case label, and
2335 * S_IFCHR for the mknod() call. This is correct. */
2336 r = mknod(a->name, mode | S_IFCHR,
2337 archive_entry_rdev(a->entry));
2340 /* TODO: Find a better way to warn about our inability
2341 * to restore a char device node. */
2343 #endif /* HAVE_MKNOD */
2346 r = mknod(a->name, mode | S_IFBLK,
2347 archive_entry_rdev(a->entry));
2350 /* TODO: Find a better way to warn about our inability
2351 * to restore a block device node. */
2353 #endif /* HAVE_MKNOD */
2355 mode = (mode | MINIMUM_DIR_MODE) & MAXIMUM_DIR_MODE;
2356 r = mkdir(a->name, mode);
2358 /* Defer setting dir times. */
2359 a->deferred |= (a->todo & TODO_TIMES);
2360 a->todo &= ~TODO_TIMES;
2361 /* Never use an immediate chmod(). */
2362 /* We can't avoid the chmod() entirely if EXTRACT_PERM
2363 * because of SysV SGID inheritance. */
2364 if ((mode != final_mode)
2365 || (a->flags & ARCHIVE_EXTRACT_PERM))
2366 a->deferred |= (a->todo & TODO_MODE);
2367 a->todo &= ~TODO_MODE;
2372 r = mkfifo(a->name, mode);
2375 /* TODO: Find a better way to warn about our inability
2376 * to restore a fifo. */
2378 #endif /* HAVE_MKFIFO */
2381 /* All the system calls above set errno on failure. */
2385 /* If we managed to set the final mode, we've avoided a chmod(). */
2386 if (mode == final_mode)
2387 a->todo &= ~TODO_MODE;
2392 * Cleanup function for archive_extract. Mostly, this involves processing
2393 * the fixup list, which is used to address a number of problems:
2394 * * Dir permissions might prevent us from restoring a file in that
2395 * dir, so we restore the dir with minimum 0700 permissions first,
2396 * then correct the mode at the end.
2397 * * Similarly, the act of restoring a file touches the directory
2398 * and changes the timestamp on the dir, so we have to touch-up dir
2399 * timestamps at the end as well.
2400 * * Some file flags can interfere with the restore by, for example,
2401 * preventing the creation of hardlinks to those files.
2402 * * Mac OS extended metadata includes ACLs, so must be deferred on dirs.
2404 * Note that tar/cpio do not require that archives be in a particular
2405 * order; there is no way to know when the last file has been restored
2406 * within a directory, so there's no way to optimize the memory usage
2407 * here by fixing up the directory any earlier than the
2410 * XXX TODO: Directory ACLs should be restored here, for the same
2411 * reason we set directory perms here. XXX
2414 _archive_write_disk_close(struct archive *_a)
2416 struct archive_write_disk *a = (struct archive_write_disk *)_a;
2417 struct fixup_entry *next, *p;
2420 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
2421 ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
2422 "archive_write_disk_close");
2423 ret = _archive_write_disk_finish_entry(&a->archive);
2425 /* Sort dir list so directories are fixed up in depth-first order. */
2426 p = sort_dir_list(a->fixup_list);
2430 a->pst = NULL; /* Mark stat cache as out-of-date. */
2432 (TODO_TIMES | TODO_MODE_BASE | TODO_ACLS | TODO_FFLAGS)) {
2434 O_WRONLY | O_BINARY | O_NOFOLLOW | O_CLOEXEC);
2436 if (p->fixup & TODO_TIMES) {
2437 set_times(a, fd, p->mode, p->name,
2438 p->atime, p->atime_nanos,
2439 p->birthtime, p->birthtime_nanos,
2440 p->mtime, p->mtime_nanos,
2441 p->ctime, p->ctime_nanos);
2443 if (p->fixup & TODO_MODE_BASE) {
2446 fchmod(fd, p->mode);
2449 chmod(p->name, p->mode);
2451 if (p->fixup & TODO_ACLS)
2452 archive_write_disk_set_acls(&a->archive, fd,
2453 p->name, &p->acl, p->mode);
2454 if (p->fixup & TODO_FFLAGS)
2455 set_fflags_platform(a, fd, p->name,
2456 p->mode, p->fflags_set, 0);
2457 if (p->fixup & TODO_MAC_METADATA)
2458 set_mac_metadata(a, p->name, p->mac_metadata,
2459 p->mac_metadata_size);
2461 archive_acl_clear(&p->acl);
2462 free(p->mac_metadata);
2469 a->fixup_list = NULL;
2474 _archive_write_disk_free(struct archive *_a)
2476 struct archive_write_disk *a;
2479 return (ARCHIVE_OK);
2480 archive_check_magic(_a, ARCHIVE_WRITE_DISK_MAGIC,
2481 ARCHIVE_STATE_ANY | ARCHIVE_STATE_FATAL, "archive_write_disk_free");
2482 a = (struct archive_write_disk *)_a;
2483 ret = _archive_write_disk_close(&a->archive);
2484 archive_write_disk_set_group_lookup(&a->archive, NULL, NULL, NULL);
2485 archive_write_disk_set_user_lookup(&a->archive, NULL, NULL, NULL);
2486 archive_entry_free(a->entry);
2487 archive_string_free(&a->_name_data);
2488 archive_string_free(&a->_tmpname_data);
2489 archive_string_free(&a->archive.error_string);
2490 archive_string_free(&a->path_safe);
2491 a->archive.magic = 0;
2492 __archive_clean(&a->archive);
2493 free(a->decmpfs_header_p);
2494 free(a->resource_fork);
2495 free(a->compressed_buffer);
2496 free(a->uncompressed_buffer);
2497 #if defined(__APPLE__) && defined(UF_COMPRESSED) && defined(HAVE_SYS_XATTR_H)\
2498 && defined(HAVE_ZLIB_H)
2499 if (a->stream_valid) {
2500 switch (deflateEnd(&a->stream)) {
2504 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
2505 "Failed to clean up compressor");
2506 ret = ARCHIVE_FATAL;
2516 * Simple O(n log n) merge sort to order the fixup list. In
2517 * particular, we want to restore dir timestamps depth-first.
2519 static struct fixup_entry *
2520 sort_dir_list(struct fixup_entry *p)
2522 struct fixup_entry *a, *b, *t;
2526 /* A one-item list is already sorted. */
2527 if (p->next == NULL)
2530 /* Step 1: split the list. */
2534 /* Step a twice, t once. */
2540 /* Now, t is at the mid-point, so break the list here. */
2545 /* Step 2: Recursively sort the two sub-lists. */
2546 a = sort_dir_list(a);
2547 b = sort_dir_list(b);
2549 /* Step 3: Merge the returned lists. */
2550 /* Pick the first element for the merged list. */
2551 if (strcmp(a->name, b->name) > 0) {
2559 /* Always put the later element on the list first. */
2560 while (a != NULL && b != NULL) {
2561 if (strcmp(a->name, b->name) > 0) {
2571 /* Only one list is non-empty, so just splice it on. */
2581 * Returns a new, initialized fixup entry.
2583 * TODO: Reduce the memory requirements for this list by using a tree
2584 * structure rather than a simple list of names.
2586 static struct fixup_entry *
2587 new_fixup(struct archive_write_disk *a, const char *pathname)
2589 struct fixup_entry *fe;
2591 fe = (struct fixup_entry *)calloc(1, sizeof(struct fixup_entry));
2593 archive_set_error(&a->archive, ENOMEM,
2594 "Can't allocate memory for a fixup");
2597 fe->next = a->fixup_list;
2600 fe->name = strdup(pathname);
2605 * Returns a fixup structure for the current entry.
2607 static struct fixup_entry *
2608 current_fixup(struct archive_write_disk *a, const char *pathname)
2610 if (a->current_fixup == NULL)
2611 a->current_fixup = new_fixup(a, pathname);
2612 return (a->current_fixup);
2615 /* Error helper for new *_fsobj functions */
2617 fsobj_error(int *a_eno, struct archive_string *a_estr,
2618 int err, const char *errstr, const char *path)
2623 archive_string_sprintf(a_estr, "%s%s", errstr, path);
2627 * TODO: Someday, integrate this with the deep dir support; they both
2628 * scan the path and both can be optimized by comparing against other
2632 * Checks the given path to see if any elements along it are symlinks. Returns
2633 * ARCHIVE_OK if there are none, otherwise puts an error in errmsg.
2636 check_symlinks_fsobj(char *path, int *a_eno, struct archive_string *a_estr,
2639 #if !defined(HAVE_LSTAT) && \
2640 !(defined(HAVE_OPENAT) && defined(HAVE_FSTATAT) && defined(HAVE_UNLINKAT))
2641 /* Platform doesn't have lstat, so we can't look for symlinks. */
2642 (void)path; /* UNUSED */
2643 (void)error_number; /* UNUSED */
2644 (void)error_string; /* UNUSED */
2645 (void)flags; /* UNUSED */
2646 return (ARCHIVE_OK);
2648 int res = ARCHIVE_OK;
2656 #if defined(HAVE_OPENAT) && defined(HAVE_FSTATAT) && defined(HAVE_UNLINKAT)
2660 /* Nothing to do here if name is empty */
2662 return (ARCHIVE_OK);
2665 * Guard against symlink tricks. Reject any archive entry whose
2666 * destination would be altered by a symlink.
2668 * Walk the filename in chunks separated by '/'. For each segment:
2669 * - if it doesn't exist, continue
2670 * - if it's symlink, abort or remove it
2671 * - if it's a directory and it's not the last chunk, cd into it
2673 * head points to the current (relative) path
2674 * tail points to the temporary \0 terminating the segment we're
2675 * currently examining
2676 * c holds what used to be in *tail
2677 * last is 1 if this is the last tail
2679 chdir_fd = la_opendirat(AT_FDCWD, ".");
2680 __archive_ensure_cloexec_flag(chdir_fd);
2682 fsobj_error(a_eno, a_estr, errno,
2683 "Could not open ", path);
2684 return (ARCHIVE_FATAL);
2689 /* TODO: reintroduce a safe cache here? */
2690 /* Skip the root directory if the path is absolute. */
2691 if(tail == path && tail[0] == '/')
2693 /* Keep going until we've checked the entire name.
2694 * head, tail, path all alias the same string, which is
2695 * temporarily zeroed at tail, so be careful restoring the
2696 * stashed (c=tail[0]) for error messages.
2697 * Exiting the loop with break is okay; continue is not.
2701 * Skip the separator we just consumed, plus any adjacent ones
2703 while (*tail == '/')
2705 /* Skip the next path element. */
2706 while (*tail != '\0' && *tail != '/')
2708 /* is this the last path component? */
2709 last = (tail[0] == '\0') || (tail[0] == '/' && tail[1] == '\0');
2710 /* temporarily truncate the string here */
2713 /* Check that we haven't hit a symlink. */
2714 #if defined(HAVE_OPENAT) && defined(HAVE_FSTATAT) && defined(HAVE_UNLINKAT)
2715 r = fstatat(chdir_fd, head, &st, AT_SYMLINK_NOFOLLOW);
2717 r = lstat(head, &st);
2721 /* We've hit a dir that doesn't exist; stop now. */
2722 if (errno == ENOENT) {
2726 * Treat any other error as fatal - best to be
2728 * Note: This effectively disables deep
2729 * directory support when security checks are
2730 * enabled. Otherwise, very long pathnames that
2731 * trigger an error here could evade the
2733 * TODO: We could do better, but it would
2734 * probably require merging the symlink checks
2735 * with the deep-directory editing.
2737 fsobj_error(a_eno, a_estr, errno,
2738 "Could not stat ", path);
2739 res = ARCHIVE_FAILED;
2742 } else if (S_ISDIR(st.st_mode)) {
2744 #if defined(HAVE_OPENAT) && defined(HAVE_FSTATAT) && defined(HAVE_UNLINKAT)
2745 fd = la_opendirat(chdir_fd, head);
2758 fsobj_error(a_eno, a_estr, errno,
2759 "Could not chdir ", path);
2760 res = (ARCHIVE_FATAL);
2763 /* Our view is now from inside this dir: */
2766 } else if (S_ISLNK(st.st_mode)) {
2769 * Last element is symlink; remove it
2770 * so we can overwrite it with the
2771 * item being extracted.
2773 #if defined(HAVE_OPENAT) && defined(HAVE_FSTATAT) && defined(HAVE_UNLINKAT)
2774 r = unlinkat(chdir_fd, head, 0);
2780 fsobj_error(a_eno, a_estr, errno,
2781 "Could not remove symlink ",
2783 res = ARCHIVE_FAILED;
2787 * Even if we did remove it, a warning
2788 * is in order. The warning is silly,
2789 * though, if we're just replacing one
2790 * symlink with another symlink.
2794 * FIXME: not sure how important this is to
2798 if (!S_ISLNK(path)) {
2799 fsobj_error(a_eno, a_estr, 0,
2800 "Removing symlink ", path);
2803 /* Symlink gone. No more problem! */
2806 } else if (flags & ARCHIVE_EXTRACT_UNLINK) {
2807 /* User asked us to remove problems. */
2808 #if defined(HAVE_OPENAT) && defined(HAVE_FSTATAT) && defined(HAVE_UNLINKAT)
2809 r = unlinkat(chdir_fd, head, 0);
2815 fsobj_error(a_eno, a_estr, 0,
2816 "Cannot remove intervening "
2818 res = ARCHIVE_FAILED;
2823 ARCHIVE_EXTRACT_SECURE_SYMLINKS) == 0) {
2825 * We are not the last element and we want to
2826 * follow symlinks if they are a directory.
2828 * This is needed to extract hardlinks over
2831 #if defined(HAVE_OPENAT) && defined(HAVE_FSTATAT) && defined(HAVE_UNLINKAT)
2832 r = fstatat(chdir_fd, head, &st, 0);
2834 r = la_stat(head, &st);
2838 if (errno == ENOENT) {
2841 fsobj_error(a_eno, a_estr,
2843 "Could not stat ", path);
2844 res = (ARCHIVE_FAILED);
2847 } else if (S_ISDIR(st.st_mode)) {
2848 #if defined(HAVE_OPENAT) && defined(HAVE_FSTATAT) && defined(HAVE_UNLINKAT)
2849 fd = la_opendirat(chdir_fd, head);
2862 fsobj_error(a_eno, a_estr,
2864 "Could not chdir ", path);
2865 res = (ARCHIVE_FATAL);
2869 * Our view is now from inside
2875 fsobj_error(a_eno, a_estr, 0,
2876 "Cannot extract through "
2878 res = ARCHIVE_FAILED;
2883 fsobj_error(a_eno, a_estr, 0,
2884 "Cannot extract through symlink ", path);
2885 res = ARCHIVE_FAILED;
2889 /* be sure to always maintain this */
2891 if (tail[0] != '\0')
2892 tail++; /* Advance to the next segment. */
2894 /* Catches loop exits via break */
2896 #if defined(HAVE_OPENAT) && defined(HAVE_FSTATAT) && defined(HAVE_UNLINKAT)
2897 /* If we operate with openat(), fstatat() and unlinkat() there was
2898 * no chdir(), so just close the fd */
2902 /* If we changed directory above, restore it here. */
2903 if (chdir_fd >= 0) {
2904 r = fchdir(chdir_fd);
2906 fsobj_error(a_eno, a_estr, errno,
2907 "chdir() failure", "");
2912 res = (ARCHIVE_FATAL);
2916 /* TODO: reintroduce a safe cache here? */
2922 * Check a->name for symlinks, returning ARCHIVE_OK if its clean, otherwise
2923 * calls archive_set_error and returns ARCHIVE_{FATAL,FAILED}
2926 check_symlinks(struct archive_write_disk *a)
2928 struct archive_string error_string;
2931 archive_string_init(&error_string);
2932 rc = check_symlinks_fsobj(a->name, &error_number, &error_string,
2934 if (rc != ARCHIVE_OK) {
2935 archive_set_error(&a->archive, error_number, "%s",
2938 archive_string_free(&error_string);
2939 a->pst = NULL; /* to be safe */
2944 #if defined(__CYGWIN__)
2946 * 1. Convert a path separator from '\' to '/' .
2947 * We shouldn't check multibyte character directly because some
2948 * character-set have been using the '\' character for a part of
2949 * its multibyte character code.
2950 * 2. Replace unusable characters in Windows with underscore('_').
2951 * See also : http://msdn.microsoft.com/en-us/library/aa365247.aspx
2954 cleanup_pathname_win(char *path)
2959 int mb, complete, utf8;
2964 utf8 = (strcmp(nl_langinfo(CODESET), "UTF-8") == 0)? 1: 0;
2965 for (p = path; *p != '\0'; p++) {
2968 /* If previous byte is smaller than 128,
2969 * this is not second byte of multibyte characters,
2970 * so we can replace '\' with '/'. */
2974 complete = 0;/* uncompleted. */
2975 } else if (*(unsigned char *)p > 127)
2979 /* Rewrite the path name if its next character is unusable. */
2980 if (*p == ':' || *p == '*' || *p == '?' || *p == '"' ||
2981 *p == '<' || *p == '>' || *p == '|')
2988 * Convert path separator in wide-character.
2991 while (*p != '\0' && alen) {
2992 l = mbtowc(&wc, p, alen);
2993 if (l == (size_t)-1) {
2994 while (*p != '\0') {
3001 if (l == 1 && wc == L'\\')
3010 * Canonicalize the pathname. In particular, this strips duplicate
3011 * '/' characters, '.' elements, and trailing '/'. It also raises an
3012 * error for an empty path, a trailing '..', (if _SECURE_NODOTDOT is
3013 * set) any '..' in the path or (if ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS
3014 * is set) if the path is absolute.
3017 cleanup_pathname_fsobj(char *path, int *a_eno, struct archive_string *a_estr,
3021 char separator = '\0';
3025 fsobj_error(a_eno, a_estr, ARCHIVE_ERRNO_MISC,
3026 "Invalid empty ", "pathname");
3027 return (ARCHIVE_FAILED);
3030 #if defined(__CYGWIN__)
3031 cleanup_pathname_win(path);
3033 /* Skip leading '/'. */
3035 if (flags & ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS) {
3036 fsobj_error(a_eno, a_estr, ARCHIVE_ERRNO_MISC,
3037 "Path is ", "absolute");
3038 return (ARCHIVE_FAILED);
3044 /* Scan the pathname one element at a time. */
3046 /* src points to first char after '/' */
3047 if (src[0] == '\0') {
3049 } else if (src[0] == '/') {
3050 /* Found '//', ignore second one. */
3053 } else if (src[0] == '.') {
3054 if (src[1] == '\0') {
3055 /* Ignore trailing '.' */
3057 } else if (src[1] == '/') {
3061 } else if (src[1] == '.') {
3062 if (src[2] == '/' || src[2] == '\0') {
3063 /* Conditionally warn about '..' */
3065 & ARCHIVE_EXTRACT_SECURE_NODOTDOT) {
3066 fsobj_error(a_eno, a_estr,
3068 "Path contains ", "'..'");
3069 return (ARCHIVE_FAILED);
3073 * Note: Under no circumstances do we
3074 * remove '..' elements. In
3075 * particular, restoring
3076 * '/foo/../bar/' should create the
3077 * 'foo' dir as a side-effect.
3082 /* Copy current element, including leading '/'. */
3085 while (*src != '\0' && *src != '/') {
3092 /* Skip '/' separator. */
3096 * We've just copied zero or more path elements, not including the
3101 * Nothing got copied. The path must have been something
3102 * like '.' or '/' or './' or '/././././/./'.
3109 /* Terminate the result. */
3111 return (ARCHIVE_OK);
3115 cleanup_pathname(struct archive_write_disk *a)
3117 struct archive_string error_string;
3120 archive_string_init(&error_string);
3121 rc = cleanup_pathname_fsobj(a->name, &error_number, &error_string,
3123 if (rc != ARCHIVE_OK) {
3124 archive_set_error(&a->archive, error_number, "%s",
3127 archive_string_free(&error_string);
3132 * Create the parent directory of the specified path, assuming path
3133 * is already in mutable storage.
3136 create_parent_dir(struct archive_write_disk *a, char *path)
3141 /* Remove tail element to obtain parent name. */
3142 slash = strrchr(path, '/');
3144 return (ARCHIVE_OK);
3146 r = create_dir(a, path);
3152 * Create the specified dir, recursing to create parents as necessary.
3154 * Returns ARCHIVE_OK if the path exists when we're done here.
3155 * Otherwise, returns ARCHIVE_FAILED.
3156 * Assumes path is in mutable storage; path is unchanged on exit.
3159 create_dir(struct archive_write_disk *a, char *path)
3162 struct fixup_entry *le;
3164 mode_t mode_final, mode;
3167 /* Check for special names and just skip them. */
3168 slash = strrchr(path, '/');
3174 if (base[0] == '\0' ||
3175 (base[0] == '.' && base[1] == '\0') ||
3176 (base[0] == '.' && base[1] == '.' && base[2] == '\0')) {
3177 /* Don't bother trying to create null path, '.', or '..'. */
3178 if (slash != NULL) {
3180 r = create_dir(a, path);
3184 return (ARCHIVE_OK);
3188 * Yes, this should be stat() and not lstat(). Using lstat()
3189 * here loses the ability to extract through symlinks. Also note
3190 * that this should not use the a->st cache.
3192 if (la_stat(path, &st) == 0) {
3193 if (S_ISDIR(st.st_mode))
3194 return (ARCHIVE_OK);
3195 if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
3196 archive_set_error(&a->archive, EEXIST,
3197 "Can't create directory '%s'", path);
3198 return (ARCHIVE_FAILED);
3200 if (unlink(path) != 0) {
3201 archive_set_error(&a->archive, errno,
3202 "Can't create directory '%s': "
3203 "Conflicting file cannot be removed",
3205 return (ARCHIVE_FAILED);
3207 } else if (errno != ENOENT && errno != ENOTDIR) {
3209 archive_set_error(&a->archive, errno,
3210 "Can't test directory '%s'", path);
3211 return (ARCHIVE_FAILED);
3212 } else if (slash != NULL) {
3214 r = create_dir(a, path);
3216 if (r != ARCHIVE_OK)
3221 * Mode we want for the final restored directory. Per POSIX,
3222 * implicitly-created dirs must be created obeying the umask.
3223 * There's no mention whether this is different for privileged
3224 * restores (which the rest of this code handles by pretending
3225 * umask=0). I've chosen here to always obey the user's umask for
3226 * implicit dirs, even if _EXTRACT_PERM was specified.
3228 mode_final = DEFAULT_DIR_MODE & ~a->user_umask;
3229 /* Mode we want on disk during the restore process. */
3231 mode |= MINIMUM_DIR_MODE;
3232 mode &= MAXIMUM_DIR_MODE;
3233 if (mkdir(path, mode) == 0) {
3234 if (mode != mode_final) {
3235 le = new_fixup(a, path);
3237 return (ARCHIVE_FATAL);
3238 le->fixup |=TODO_MODE_BASE;
3239 le->mode = mode_final;
3241 return (ARCHIVE_OK);
3245 * Without the following check, a/b/../b/c/d fails at the
3246 * second visit to 'b', so 'd' can't be created. Note that we
3247 * don't add it to the fixup list here, as it's already been
3250 if (la_stat(path, &st) == 0 && S_ISDIR(st.st_mode))
3251 return (ARCHIVE_OK);
3253 archive_set_error(&a->archive, errno, "Failed to create dir '%s'",
3255 return (ARCHIVE_FAILED);
3259 * Note: Although we can skip setting the user id if the desired user
3260 * id matches the current user, we cannot skip setting the group, as
3261 * many systems set the gid based on the containing directory. So
3262 * we have to perform a chown syscall if we want to set the SGID
3263 * bit. (The alternative is to stat() and then possibly chown(); it's
3264 * more efficient to skip the stat() and just always chown().) Note
3265 * that a successful chown() here clears the TODO_SGID_CHECK bit, which
3266 * allows set_mode to skip the stat() check for the GID.
3269 set_ownership(struct archive_write_disk *a)
3271 #if !defined(__CYGWIN__) && !defined(__linux__)
3273 * On Linux, a process may have the CAP_CHOWN capability.
3274 * On Windows there is no 'root' user with uid 0.
3275 * Elsewhere we can skip calling chown if we are not root and the desired
3276 * user id does not match the current user.
3278 if (a->user_uid != 0 && a->user_uid != a->uid) {
3279 archive_set_error(&a->archive, errno,
3280 "Can't set UID=%jd", (intmax_t)a->uid);
3281 return (ARCHIVE_WARN);
3286 /* If we have an fd, we can avoid a race. */
3287 if (a->fd >= 0 && fchown(a->fd, a->uid, a->gid) == 0) {
3288 /* We've set owner and know uid/gid are correct. */
3289 a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
3290 return (ARCHIVE_OK);
3294 /* We prefer lchown() but will use chown() if that's all we have. */
3295 /* Of course, if we have neither, this will always fail. */
3297 if (lchown(a->name, a->uid, a->gid) == 0) {
3298 /* We've set owner and know uid/gid are correct. */
3299 a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
3300 return (ARCHIVE_OK);
3303 if (!S_ISLNK(a->mode) && chown(a->name, a->uid, a->gid) == 0) {
3304 /* We've set owner and know uid/gid are correct. */
3305 a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
3306 return (ARCHIVE_OK);
3310 archive_set_error(&a->archive, errno,
3311 "Can't set user=%jd/group=%jd for %s",
3312 (intmax_t)a->uid, (intmax_t)a->gid, a->name);
3313 return (ARCHIVE_WARN);
3317 * Note: Returns 0 on success, non-zero on failure.
3320 set_time(int fd, int mode, const char *name,
3321 time_t atime, long atime_nsec,
3322 time_t mtime, long mtime_nsec)
3324 /* Select the best implementation for this platform. */
3325 #if defined(HAVE_UTIMENSAT) && defined(HAVE_FUTIMENS)
3327 * utimensat() and futimens() are defined in
3328 * POSIX.1-2008. They support ns resolution and setting times
3329 * on fds and symlinks.
3331 struct timespec ts[2];
3332 (void)mode; /* UNUSED */
3333 ts[0].tv_sec = atime;
3334 ts[0].tv_nsec = atime_nsec;
3335 ts[1].tv_sec = mtime;
3336 ts[1].tv_nsec = mtime_nsec;
3338 return futimens(fd, ts);
3339 return utimensat(AT_FDCWD, name, ts, AT_SYMLINK_NOFOLLOW);
3343 * The utimes()-family functions support µs-resolution and
3344 * setting times fds and symlinks. utimes() is documented as
3345 * LEGACY by POSIX, futimes() and lutimes() are not described
3348 struct timeval times[2];
3350 times[0].tv_sec = atime;
3351 times[0].tv_usec = atime_nsec / 1000;
3352 times[1].tv_sec = mtime;
3353 times[1].tv_usec = mtime_nsec / 1000;
3357 return (futimes(fd, times));
3359 (void)fd; /* UNUSED */
3362 (void)mode; /* UNUSED */
3363 return (lutimes(name, times));
3367 return (utimes(name, times));
3370 #elif defined(HAVE_UTIME)
3372 * utime() is POSIX-standard but only supports 1s resolution and
3373 * does not support fds or symlinks.
3375 struct utimbuf times;
3376 (void)fd; /* UNUSED */
3377 (void)name; /* UNUSED */
3378 (void)atime_nsec; /* UNUSED */
3379 (void)mtime_nsec; /* UNUSED */
3380 times.actime = atime;
3381 times.modtime = mtime;
3383 return (ARCHIVE_OK);
3384 return (utime(name, ×));
3388 * We don't know how to set the time on this platform.
3390 (void)fd; /* UNUSED */
3391 (void)mode; /* UNUSED */
3392 (void)name; /* UNUSED */
3393 (void)atime_nsec; /* UNUSED */
3394 (void)mtime_nsec; /* UNUSED */
3395 return (ARCHIVE_WARN);
3401 set_time_tru64(int fd, int mode, const char *name,
3402 time_t atime, long atime_nsec,
3403 time_t mtime, long mtime_nsec,
3404 time_t ctime, long ctime_nsec)
3406 struct attr_timbuf tstamp;
3407 tstamp.atime.tv_sec = atime;
3408 tstamp.mtime.tv_sec = mtime;
3409 tstamp.ctime.tv_sec = ctime;
3410 #if defined (__hpux) && defined (__ia64)
3411 tstamp.atime.tv_nsec = atime_nsec;
3412 tstamp.mtime.tv_nsec = mtime_nsec;
3413 tstamp.ctime.tv_nsec = ctime_nsec;
3415 tstamp.atime.tv_usec = atime_nsec / 1000;
3416 tstamp.mtime.tv_usec = mtime_nsec / 1000;
3417 tstamp.ctime.tv_usec = ctime_nsec / 1000;
3419 return (fcntl(fd,F_SETTIMES,&tstamp));
3421 #endif /* F_SETTIMES */
3424 set_times(struct archive_write_disk *a,
3425 int fd, int mode, const char *name,
3426 time_t atime, long atime_nanos,
3427 time_t birthtime, long birthtime_nanos,
3428 time_t mtime, long mtime_nanos,
3429 time_t cctime, long ctime_nanos)
3431 /* Note: set_time doesn't use libarchive return conventions!
3432 * It uses syscall conventions. So 0 here instead of ARCHIVE_OK. */
3437 * on Tru64 try own fcntl first which can restore even the
3438 * ctime, fall back to default code path below if it fails
3439 * or if we are not running as root
3441 if (a->user_uid == 0 &&
3442 set_time_tru64(fd, mode, name,
3443 atime, atime_nanos, mtime,
3444 mtime_nanos, cctime, ctime_nanos) == 0) {
3445 return (ARCHIVE_OK);
3448 (void)cctime; /* UNUSED */
3449 (void)ctime_nanos; /* UNUSED */
3452 #ifdef HAVE_STRUCT_STAT_ST_BIRTHTIME
3454 * If you have struct stat.st_birthtime, we assume BSD
3455 * birthtime semantics, in which {f,l,}utimes() updates
3456 * birthtime to earliest mtime. So we set the time twice,
3457 * first using the birthtime, then using the mtime. If
3458 * birthtime == mtime, this isn't necessary, so we skip it.
3459 * If birthtime > mtime, then this won't work, so we skip it.
3461 if (birthtime < mtime
3462 || (birthtime == mtime && birthtime_nanos < mtime_nanos))
3463 r1 = set_time(fd, mode, name,
3465 birthtime, birthtime_nanos);
3467 (void)birthtime; /* UNUSED */
3468 (void)birthtime_nanos; /* UNUSED */
3470 r2 = set_time(fd, mode, name,
3472 mtime, mtime_nanos);
3473 if (r1 != 0 || r2 != 0) {
3474 archive_set_error(&a->archive, errno,
3475 "Can't restore time");
3476 return (ARCHIVE_WARN);
3478 return (ARCHIVE_OK);
3482 set_times_from_entry(struct archive_write_disk *a)
3484 time_t atime, birthtime, mtime, cctime;
3485 long atime_nsec, birthtime_nsec, mtime_nsec, ctime_nsec;
3487 /* Suitable defaults. */
3488 atime = birthtime = mtime = cctime = a->start_time;
3489 atime_nsec = birthtime_nsec = mtime_nsec = ctime_nsec = 0;
3491 /* If no time was provided, we're done. */
3492 if (!archive_entry_atime_is_set(a->entry)
3493 #if HAVE_STRUCT_STAT_ST_BIRTHTIME
3494 && !archive_entry_birthtime_is_set(a->entry)
3496 && !archive_entry_mtime_is_set(a->entry))
3497 return (ARCHIVE_OK);
3499 if (archive_entry_atime_is_set(a->entry)) {
3500 atime = archive_entry_atime(a->entry);
3501 atime_nsec = archive_entry_atime_nsec(a->entry);
3503 if (archive_entry_birthtime_is_set(a->entry)) {
3504 birthtime = archive_entry_birthtime(a->entry);
3505 birthtime_nsec = archive_entry_birthtime_nsec(a->entry);
3507 if (archive_entry_mtime_is_set(a->entry)) {
3508 mtime = archive_entry_mtime(a->entry);
3509 mtime_nsec = archive_entry_mtime_nsec(a->entry);
3511 if (archive_entry_ctime_is_set(a->entry)) {
3512 cctime = archive_entry_ctime(a->entry);
3513 ctime_nsec = archive_entry_ctime_nsec(a->entry);
3516 return set_times(a, a->fd, a->mode, a->name,
3518 birthtime, birthtime_nsec,
3520 cctime, ctime_nsec);
3524 set_mode(struct archive_write_disk *a, int mode)
3528 mode &= 07777; /* Strip off file type bits. */
3530 if (a->todo & TODO_SGID_CHECK) {
3532 * If we don't know the GID is right, we must stat()
3533 * to verify it. We can't just check the GID of this
3534 * process, since systems sometimes set GID from
3535 * the enclosing dir or based on ACLs.
3537 if ((r = lazy_stat(a)) != ARCHIVE_OK)
3539 if (a->pst->st_gid != a->gid) {
3541 if (a->flags & ARCHIVE_EXTRACT_OWNER) {
3543 * This is only an error if you
3544 * requested owner restore. If you
3545 * didn't, we'll try to restore
3546 * sgid/suid, but won't consider it a
3547 * problem if we can't.
3549 archive_set_error(&a->archive, -1,
3550 "Can't restore SGID bit");
3554 /* While we're here, double-check the UID. */
3555 if (a->pst->st_uid != a->uid
3556 && (a->todo & TODO_SUID)) {
3558 if (a->flags & ARCHIVE_EXTRACT_OWNER) {
3559 archive_set_error(&a->archive, -1,
3560 "Can't restore SUID bit");
3564 a->todo &= ~TODO_SGID_CHECK;
3565 a->todo &= ~TODO_SUID_CHECK;
3566 } else if (a->todo & TODO_SUID_CHECK) {
3568 * If we don't know the UID is right, we can just check
3569 * the user, since all systems set the file UID from
3572 if (a->user_uid != a->uid) {
3574 if (a->flags & ARCHIVE_EXTRACT_OWNER) {
3575 archive_set_error(&a->archive, -1,
3576 "Can't make file SUID");
3580 a->todo &= ~TODO_SUID_CHECK;
3583 if (S_ISLNK(a->mode)) {
3586 * If this is a symlink, use lchmod(). If the
3587 * platform doesn't support lchmod(), just skip it. A
3588 * platform that doesn't provide a way to set
3589 * permissions on symlinks probably ignores
3590 * permissions on symlinks, so a failure here has no
3593 if (lchmod(a->name, mode) != 0) {
3597 #if ENOTSUP != EOPNOTSUPP
3601 * if lchmod is defined but the platform
3602 * doesn't support it, silently ignore
3607 archive_set_error(&a->archive, errno,
3608 "Can't set permissions to 0%o", (int)mode);
3613 } else if (!S_ISDIR(a->mode)) {
3615 * If it's not a symlink and not a dir, then use
3616 * fchmod() or chmod(), depending on whether we have
3617 * an fd. Dirs get their perms set during the
3618 * post-extract fixup, which is handled elsewhere.
3622 r2 = fchmod(a->fd, mode);
3625 /* If this platform lacks fchmod(), then
3626 * we'll just use chmod(). */
3627 r2 = chmod(a->name, mode);
3630 archive_set_error(&a->archive, errno,
3631 "Can't set permissions to 0%o", (int)mode);
3639 set_fflags(struct archive_write_disk *a)
3641 struct fixup_entry *le;
3642 unsigned long set, clear;
3644 mode_t mode = archive_entry_mode(a->entry);
3646 * Make 'critical_flags' hold all file flags that can't be
3647 * immediately restored. For example, on BSD systems,
3648 * SF_IMMUTABLE prevents hardlinks from being created, so
3649 * should not be set until after any hardlinks are created. To
3650 * preserve some semblance of portability, this uses #ifdef
3651 * extensively. Ugly, but it works.
3653 * Yes, Virginia, this does create a security race. It's mitigated
3654 * somewhat by the practice of creating dirs 0700 until the extract
3655 * is done, but it would be nice if we could do more than that.
3656 * People restoring critical file systems should be wary of
3657 * other programs that might try to muck with files as they're
3660 const int critical_flags = 0
3673 #if defined(FS_APPEND_FL)
3675 #elif defined(EXT2_APPEND_FL)
3678 #if defined(FS_IMMUTABLE_FL)
3680 #elif defined(EXT2_IMMUTABLE_FL)
3683 #ifdef FS_JOURNAL_DATA_FL
3684 | FS_JOURNAL_DATA_FL
3688 if (a->todo & TODO_FFLAGS) {
3689 archive_entry_fflags(a->entry, &set, &clear);
3692 * The first test encourages the compiler to eliminate
3693 * all of this if it's not necessary.
3695 if ((critical_flags != 0) && (set & critical_flags)) {
3696 le = current_fixup(a, a->name);
3698 return (ARCHIVE_FATAL);
3699 le->fixup |= TODO_FFLAGS;
3700 le->fflags_set = set;
3701 /* Store the mode if it's not already there. */
3702 if ((le->fixup & TODO_MODE) == 0)
3705 r = set_fflags_platform(a, a->fd,
3706 a->name, mode, set, clear);
3707 if (r != ARCHIVE_OK)
3711 return (ARCHIVE_OK);
3715 clear_nochange_fflags(struct archive_write_disk *a)
3717 mode_t mode = archive_entry_mode(a->entry);
3718 const int nochange_flags = 0
3731 #ifdef EXT2_APPEND_FL
3734 #ifdef EXT2_IMMUTABLE_FL
3739 return (set_fflags_platform(a, a->fd, a->name, mode, 0,
3744 #if ( defined(HAVE_LCHFLAGS) || defined(HAVE_CHFLAGS) || defined(HAVE_FCHFLAGS) ) && defined(HAVE_STRUCT_STAT_ST_FLAGS)
3746 * BSD reads flags using stat() and sets them with one of {f,l,}chflags()
3749 set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
3750 mode_t mode, unsigned long set, unsigned long clear)
3753 const int sf_mask = 0
3767 (void)mode; /* UNUSED */
3769 if (set == 0 && clear == 0)
3770 return (ARCHIVE_OK);
3773 * XXX Is the stat here really necessary? Or can I just use
3774 * the 'set' flags directly? In particular, I'm not sure
3775 * about the correct approach if we're overwriting an existing
3776 * file that already has flags on it. XXX
3778 if ((r = lazy_stat(a)) != ARCHIVE_OK)
3781 a->st.st_flags &= ~clear;
3782 a->st.st_flags |= set;
3784 /* Only super-user may change SF_* flags */
3786 if (a->user_uid != 0)
3787 a->st.st_flags &= ~sf_mask;
3789 #ifdef HAVE_FCHFLAGS
3790 /* If platform has fchflags() and we were given an fd, use it. */
3791 if (fd >= 0 && fchflags(fd, a->st.st_flags) == 0)
3792 return (ARCHIVE_OK);
3795 * If we can't use the fd to set the flags, we'll use the
3796 * pathname to set flags. We prefer lchflags() but will use
3797 * chflags() if we must.
3799 #ifdef HAVE_LCHFLAGS
3800 if (lchflags(name, a->st.st_flags) == 0)
3801 return (ARCHIVE_OK);
3802 #elif defined(HAVE_CHFLAGS)
3803 if (S_ISLNK(a->st.st_mode)) {
3804 archive_set_error(&a->archive, errno,
3805 "Can't set file flags on symlink.");
3806 return (ARCHIVE_WARN);
3808 if (chflags(name, a->st.st_flags) == 0)
3809 return (ARCHIVE_OK);
3811 archive_set_error(&a->archive, errno,
3812 "Failed to set file flags");
3813 return (ARCHIVE_WARN);
3816 #elif (defined(FS_IOC_GETFLAGS) && defined(FS_IOC_SETFLAGS) && \
3817 defined(HAVE_WORKING_FS_IOC_GETFLAGS)) || \
3818 (defined(EXT2_IOC_GETFLAGS) && defined(EXT2_IOC_SETFLAGS) && \
3819 defined(HAVE_WORKING_EXT2_IOC_GETFLAGS))
3821 * Linux uses ioctl() to read and write file flags.
3824 set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
3825 mode_t mode, unsigned long set, unsigned long clear)
3829 int newflags, oldflags;
3831 * Linux has no define for the flags that are only settable by
3832 * the root user. This code may seem a little complex, but
3833 * there seem to be some Linux systems that lack these
3834 * defines. (?) The code below degrades reasonably gracefully
3835 * if sf_mask is incomplete.
3837 const int sf_mask = 0
3838 #if defined(FS_IMMUTABLE_FL)
3840 #elif defined(EXT2_IMMUTABLE_FL)
3843 #if defined(FS_APPEND_FL)
3845 #elif defined(EXT2_APPEND_FL)
3848 #if defined(FS_JOURNAL_DATA_FL)
3849 | FS_JOURNAL_DATA_FL
3853 if (set == 0 && clear == 0)
3854 return (ARCHIVE_OK);
3855 /* Only regular files and dirs can have flags. */
3856 if (!S_ISREG(mode) && !S_ISDIR(mode))
3857 return (ARCHIVE_OK);
3859 /* If we weren't given an fd, open it ourselves. */
3861 myfd = open(name, O_RDONLY | O_NONBLOCK | O_BINARY | O_CLOEXEC);
3862 __archive_ensure_cloexec_flag(myfd);
3865 return (ARCHIVE_OK);
3868 * XXX As above, this would be way simpler if we didn't have
3869 * to read the current flags from disk. XXX
3873 /* Read the current file flags. */
3875 #ifdef FS_IOC_GETFLAGS
3883 /* Try setting the flags as given. */
3884 newflags = (oldflags & ~clear) | set;
3886 #ifdef FS_IOC_SETFLAGS
3896 /* If we couldn't set all the flags, try again with a subset. */
3897 newflags &= ~sf_mask;
3898 oldflags &= sf_mask;
3899 newflags |= oldflags;
3901 #ifdef FS_IOC_SETFLAGS
3909 /* We couldn't set the flags, so report the failure. */
3911 archive_set_error(&a->archive, errno,
3912 "Failed to set file flags");
3923 * Of course, some systems have neither BSD chflags() nor Linux' flags
3924 * support through ioctl().
3927 set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
3928 mode_t mode, unsigned long set, unsigned long clear)
3930 (void)a; /* UNUSED */
3931 (void)fd; /* UNUSED */
3932 (void)name; /* UNUSED */
3933 (void)mode; /* UNUSED */
3934 (void)set; /* UNUSED */
3935 (void)clear; /* UNUSED */
3936 return (ARCHIVE_OK);
3939 #endif /* __linux */
3941 #ifndef HAVE_COPYFILE_H
3942 /* Default is to simply drop Mac extended metadata. */
3944 set_mac_metadata(struct archive_write_disk *a, const char *pathname,
3945 const void *metadata, size_t metadata_size)
3947 (void)a; /* UNUSED */
3948 (void)pathname; /* UNUSED */
3949 (void)metadata; /* UNUSED */
3950 (void)metadata_size; /* UNUSED */
3951 return (ARCHIVE_OK);
3955 fixup_appledouble(struct archive_write_disk *a, const char *pathname)
3957 (void)a; /* UNUSED */
3958 (void)pathname; /* UNUSED */
3959 return (ARCHIVE_OK);
3964 * On Mac OS, we use copyfile() to unpack the metadata and
3965 * apply it to the target file.
3968 #if defined(HAVE_SYS_XATTR_H)
3970 copy_xattrs(struct archive_write_disk *a, int tmpfd, int dffd)
3973 char *xattr_names = NULL, *xattr_val = NULL;
3974 int ret = ARCHIVE_OK, xattr_i;
3976 xattr_size = flistxattr(tmpfd, NULL, 0, 0);
3977 if (xattr_size == -1) {
3978 archive_set_error(&a->archive, errno,
3979 "Failed to read metadata(xattr)");
3983 xattr_names = malloc(xattr_size);
3984 if (xattr_names == NULL) {
3985 archive_set_error(&a->archive, ENOMEM,
3986 "Can't allocate memory for metadata(xattr)");
3987 ret = ARCHIVE_FATAL;
3990 xattr_size = flistxattr(tmpfd, xattr_names, xattr_size, 0);
3991 if (xattr_size == -1) {
3992 archive_set_error(&a->archive, errno,
3993 "Failed to read metadata(xattr)");
3997 for (xattr_i = 0; xattr_i < xattr_size;
3998 xattr_i += strlen(xattr_names + xattr_i) + 1) {
3999 char *xattr_val_saved;
4003 s = fgetxattr(tmpfd, xattr_names + xattr_i, NULL, 0, 0, 0);
4005 archive_set_error(&a->archive, errno,
4006 "Failed to get metadata(xattr)");
4010 xattr_val_saved = xattr_val;
4011 xattr_val = realloc(xattr_val, s);
4012 if (xattr_val == NULL) {
4013 archive_set_error(&a->archive, ENOMEM,
4014 "Failed to get metadata(xattr)");
4016 free(xattr_val_saved);
4019 s = fgetxattr(tmpfd, xattr_names + xattr_i, xattr_val, s, 0, 0);
4021 archive_set_error(&a->archive, errno,
4022 "Failed to get metadata(xattr)");
4026 f = fsetxattr(dffd, xattr_names + xattr_i, xattr_val, s, 0, 0);
4028 archive_set_error(&a->archive, errno,
4029 "Failed to get metadata(xattr)");
4042 copy_acls(struct archive_write_disk *a, int tmpfd, int dffd)
4044 #ifndef HAVE_SYS_ACL_H
4047 acl_t acl, dfacl = NULL;
4048 int acl_r, ret = ARCHIVE_OK;
4050 acl = acl_get_fd(tmpfd);
4052 if (errno == ENOENT)
4053 /* There are not any ACLs. */
4055 archive_set_error(&a->archive, errno,
4056 "Failed to get metadata(acl)");
4060 dfacl = acl_dup(acl);
4061 acl_r = acl_set_fd(dffd, dfacl);
4063 archive_set_error(&a->archive, errno,
4064 "Failed to get metadata(acl)");
4078 create_tempdatafork(struct archive_write_disk *a, const char *pathname)
4080 struct archive_string tmpdatafork;
4083 archive_string_init(&tmpdatafork);
4084 archive_strcpy(&tmpdatafork, "tar.md.XXXXXX");
4085 tmpfd = mkstemp(tmpdatafork.s);
4087 archive_set_error(&a->archive, errno,
4088 "Failed to mkstemp");
4089 archive_string_free(&tmpdatafork);
4092 if (copyfile(pathname, tmpdatafork.s, 0,
4093 COPYFILE_UNPACK | COPYFILE_NOFOLLOW
4094 | COPYFILE_ACL | COPYFILE_XATTR) < 0) {
4095 archive_set_error(&a->archive, errno,
4096 "Failed to restore metadata");
4100 unlink(tmpdatafork.s);
4101 archive_string_free(&tmpdatafork);
4106 copy_metadata(struct archive_write_disk *a, const char *metadata,
4107 const char *datafork, int datafork_compressed)
4109 int ret = ARCHIVE_OK;
4111 if (datafork_compressed) {
4114 tmpfd = create_tempdatafork(a, metadata);
4116 return (ARCHIVE_WARN);
4119 * Do not open the data fork compressed by HFS+ compression
4120 * with at least a writing mode(O_RDWR or O_WRONLY). it
4121 * makes the data fork uncompressed.
4123 dffd = open(datafork, 0);
4125 archive_set_error(&a->archive, errno,
4126 "Failed to open the data fork for metadata");
4128 return (ARCHIVE_WARN);
4131 #if defined(HAVE_SYS_XATTR_H)
4132 ret = copy_xattrs(a, tmpfd, dffd);
4133 if (ret == ARCHIVE_OK)
4135 ret = copy_acls(a, tmpfd, dffd);
4139 if (copyfile(metadata, datafork, 0,
4140 COPYFILE_UNPACK | COPYFILE_NOFOLLOW
4141 | COPYFILE_ACL | COPYFILE_XATTR) < 0) {
4142 archive_set_error(&a->archive, errno,
4143 "Failed to restore metadata");
4151 set_mac_metadata(struct archive_write_disk *a, const char *pathname,
4152 const void *metadata, size_t metadata_size)
4154 struct archive_string tmp;
4157 int ret = ARCHIVE_OK;
4159 /* This would be simpler if copyfile() could just accept the
4160 * metadata as a block of memory; then we could sidestep this
4161 * silly dance of writing the data to disk just so that
4162 * copyfile() can read it back in again. */
4163 archive_string_init(&tmp);
4164 archive_strcpy(&tmp, pathname);
4165 archive_strcat(&tmp, ".XXXXXX");
4166 fd = mkstemp(tmp.s);
4169 archive_set_error(&a->archive, errno,
4170 "Failed to restore metadata");
4171 archive_string_free(&tmp);
4172 return (ARCHIVE_WARN);
4174 written = write(fd, metadata, metadata_size);
4176 if ((size_t)written != metadata_size) {
4177 archive_set_error(&a->archive, errno,
4178 "Failed to restore metadata");
4183 #if defined(UF_COMPRESSED)
4184 if ((a->todo & TODO_HFS_COMPRESSION) != 0 &&
4185 (ret = lazy_stat(a)) == ARCHIVE_OK)
4186 compressed = a->st.st_flags & UF_COMPRESSED;
4190 ret = copy_metadata(a, tmp.s, pathname, compressed);
4193 archive_string_free(&tmp);
4198 fixup_appledouble(struct archive_write_disk *a, const char *pathname)
4203 struct archive_string datafork;
4204 int fd = -1, ret = ARCHIVE_OK;
4206 archive_string_init(&datafork);
4207 /* Check if the current file name is a type of the resource
4209 p = strrchr(pathname, '/');
4214 if (p[0] != '.' || p[1] != '_')
4215 goto skip_appledouble;
4218 * Check if the data fork file exists.
4220 * TODO: Check if this write disk object has handled it.
4222 archive_strncpy(&datafork, pathname, p - pathname);
4223 archive_strcat(&datafork, p + 2);
4224 if (lstat(datafork.s, &st) == -1 ||
4225 (st.st_mode & AE_IFMT) != AE_IFREG)
4226 goto skip_appledouble;
4229 * Check if the file is in the AppleDouble form.
4231 fd = open(pathname, O_RDONLY | O_BINARY | O_CLOEXEC);
4232 __archive_ensure_cloexec_flag(fd);
4234 archive_set_error(&a->archive, errno,
4235 "Failed to open a restoring file");
4237 goto skip_appledouble;
4239 if (read(fd, buff, 8) == -1) {
4240 archive_set_error(&a->archive, errno,
4241 "Failed to read a restoring file");
4244 goto skip_appledouble;
4247 /* Check AppleDouble Magic Code. */
4248 if (archive_be32dec(buff) != 0x00051607)
4249 goto skip_appledouble;
4250 /* Check AppleDouble Version. */
4251 if (archive_be32dec(buff+4) != 0x00020000)
4252 goto skip_appledouble;
4254 ret = copy_metadata(a, pathname, datafork.s,
4255 #if defined(UF_COMPRESSED)
4256 st.st_flags & UF_COMPRESSED);
4260 if (ret == ARCHIVE_OK) {
4265 archive_string_free(&datafork);
4270 #if ARCHIVE_XATTR_LINUX || ARCHIVE_XATTR_DARWIN || ARCHIVE_XATTR_AIX
4272 * Restore extended attributes - Linux, Darwin and AIX implementations:
4273 * AIX' ea interface is syntaxwise identical to the Linux xattr interface.
4276 set_xattrs(struct archive_write_disk *a)
4278 struct archive_entry *entry = a->entry;
4279 struct archive_string errlist;
4280 int ret = ARCHIVE_OK;
4281 int i = archive_entry_xattr_reset(entry);
4284 archive_string_init(&errlist);
4292 archive_entry_xattr_next(entry, &name, &value, &size);
4296 #if ARCHIVE_XATTR_LINUX
4297 /* Linux: quietly skip POSIX.1e ACL extended attributes */
4298 if (strncmp(name, "system.", 7) == 0 &&
4299 (strcmp(name + 7, "posix_acl_access") == 0 ||
4300 strcmp(name + 7, "posix_acl_default") == 0))
4302 if (strncmp(name, "trusted.SGI_", 12) == 0 &&
4303 (strcmp(name + 12, "ACL_DEFAULT") == 0 ||
4304 strcmp(name + 12, "ACL_FILE") == 0))
4307 /* Linux: xfsroot namespace is obsolete and unsupported */
4308 if (strncmp(name, "xfsroot.", 8) == 0) {
4310 archive_strcat(&errlist, name);
4311 archive_strappend_char(&errlist, ' ');
4317 #if ARCHIVE_XATTR_LINUX
4318 e = fsetxattr(a->fd, name, value, size, 0);
4319 #elif ARCHIVE_XATTR_DARWIN
4320 e = fsetxattr(a->fd, name, value, size, 0, 0);
4321 #elif ARCHIVE_XATTR_AIX
4322 e = fsetea(a->fd, name, value, size, 0);
4325 #if ARCHIVE_XATTR_LINUX
4326 e = lsetxattr(archive_entry_pathname(entry),
4327 name, value, size, 0);
4328 #elif ARCHIVE_XATTR_DARWIN
4329 e = setxattr(archive_entry_pathname(entry),
4330 name, value, size, 0, XATTR_NOFOLLOW);
4331 #elif ARCHIVE_XATTR_AIX
4332 e = lsetea(archive_entry_pathname(entry),
4333 name, value, size, 0);
4338 archive_strcat(&errlist, name);
4339 archive_strappend_char(&errlist, ' ');
4340 if (errno != ENOTSUP && errno != ENOSYS)
4345 if (ret == ARCHIVE_WARN) {
4346 if (fail && errlist.length > 0) {
4348 errlist.s[errlist.length] = '\0';
4349 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
4350 "Cannot restore extended attributes: %s",
4353 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
4354 "Cannot restore extended "
4355 "attributes on this file system.");
4358 archive_string_free(&errlist);
4361 #elif ARCHIVE_XATTR_FREEBSD
4363 * Restore extended attributes - FreeBSD implementation
4366 set_xattrs(struct archive_write_disk *a)
4368 struct archive_entry *entry = a->entry;
4369 struct archive_string errlist;
4370 int ret = ARCHIVE_OK;
4371 int i = archive_entry_xattr_reset(entry);
4374 archive_string_init(&errlist);
4380 archive_entry_xattr_next(entry, &name, &value, &size);
4385 if (strncmp(name, "user.", 5) == 0) {
4386 /* "user." attributes go to user namespace */
4388 namespace = EXTATTR_NAMESPACE_USER;
4390 /* Other namespaces are unsupported */
4391 archive_strcat(&errlist, name);
4392 archive_strappend_char(&errlist, ' ');
4399 e = extattr_set_fd(a->fd, namespace, name,
4402 e = extattr_set_link(
4403 archive_entry_pathname(entry), namespace,
4406 if (e != (ssize_t)size) {
4407 archive_strcat(&errlist, name);
4408 archive_strappend_char(&errlist, ' ');
4410 if (errno != ENOTSUP && errno != ENOSYS)
4416 if (ret == ARCHIVE_WARN) {
4417 if (fail && errlist.length > 0) {
4419 errlist.s[errlist.length] = '\0';
4421 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
4422 "Cannot restore extended attributes: %s",
4425 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
4426 "Cannot restore extended "
4427 "attributes on this file system.");
4430 archive_string_free(&errlist);
4435 * Restore extended attributes - stub implementation for unsupported systems
4438 set_xattrs(struct archive_write_disk *a)
4440 static int warning_done = 0;
4442 /* If there aren't any extended attributes, then it's okay not
4443 * to extract them, otherwise, issue a single warning. */
4444 if (archive_entry_xattr_count(a->entry) != 0 && !warning_done) {
4446 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
4447 "Cannot restore extended attributes on this system");
4448 return (ARCHIVE_WARN);
4450 /* Warning was already emitted; suppress further warnings. */
4451 return (ARCHIVE_OK);
4456 * Test if file on disk is older than entry.
4459 older(struct stat *st, struct archive_entry *entry)
4461 /* First, test the seconds and return if we have a definite answer. */
4462 /* Definitely older. */
4463 if (to_int64_time(st->st_mtime) < to_int64_time(archive_entry_mtime(entry)))
4465 /* Definitely younger. */
4466 if (to_int64_time(st->st_mtime) > to_int64_time(archive_entry_mtime(entry)))
4468 /* If this platform supports fractional seconds, try those. */
4469 #if HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC
4470 /* Definitely older. */
4471 if (st->st_mtimespec.tv_nsec < archive_entry_mtime_nsec(entry))
4473 #elif HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
4474 /* Definitely older. */
4475 if (st->st_mtim.tv_nsec < archive_entry_mtime_nsec(entry))
4477 #elif HAVE_STRUCT_STAT_ST_MTIME_N
4479 if (st->st_mtime_n < archive_entry_mtime_nsec(entry))
4481 #elif HAVE_STRUCT_STAT_ST_UMTIME
4483 if (st->st_umtime * 1000 < archive_entry_mtime_nsec(entry))
4485 #elif HAVE_STRUCT_STAT_ST_MTIME_USEC
4487 if (st->st_mtime_usec * 1000 < archive_entry_mtime_nsec(entry))
4490 /* This system doesn't have high-res timestamps. */
4492 /* Same age or newer, so not older. */
4496 #ifndef ARCHIVE_ACL_SUPPORT
4498 archive_write_disk_set_acls(struct archive *a, int fd, const char *name,
4499 struct archive_acl *abstract_acl, __LA_MODE_T mode)
4501 (void)a; /* UNUSED */
4502 (void)fd; /* UNUSED */
4503 (void)name; /* UNUSED */
4504 (void)abstract_acl; /* UNUSED */
4505 (void)mode; /* UNUSED */
4506 return (ARCHIVE_OK);
4510 #endif /* !_WIN32 || __CYGWIN__ */
projects / FreeBSD / stable / 10.git / blob